Links on items not purchased by us are used to show type of object and cost estimate but are not necessarily the exact item we used. Items that are greyed out and in paratheses in the Testing Iteration section were also used in final build. Their cost counts towards both subtotals but only once in the final total.  Items in the testing section with the same name as that in the final iteration section but are not greyed out are in addition to the parts used for the final iteration.
ABCDEF
1
MATERIAL SIZE
QTY.
Cost/Part
Est. Cost
Actual Cost
2
----- FINAL ITERATION BUILD -----
3
Fasteners
4
4-40 Socket Head Cap Screw1/2"20.085$0.17-¹
5
"5/8"80.083$0.66-¹
6
"3/4"170.084$1.43-¹
7
"1"70.075$0.53-¹
8
"1.5"70.59$4.13$5.90
9
4-40 Socket Head Countersink Screw
5/8"60.091$0.55-¹
10
"1"10.389$0.39-¹
11
4-40 Low Profile Machine Nut590.024$1.42-⁶
12
2-56 Philips-Slotted Screw and Nut
1/2"20.0118$0.02$1.18
13
3/8"-16 Acorn Nut10.59$0.59$1.18
14
3/8"-16 Jam Nut20.1967$0.39$1.18
15
1/4"-20 Jam Nut40.148$0.59-¹
16
Cotter Pin1/16x2"20.2$0.40$0.60
17
#4 Nylon Spacer3/8"30.079$0.24-⁶
18
Servo Mounting Screw10.81$0.81-¹
19
Finishing Nail1"40.022$0.09-⁷
20
Stock
21
3/8"-16tpi Threaded Rod24"12.87$2.87$2.87
22
3/8" Round Rod24"25.78$11.56$11.56
23
(9mm Round Rod)12"12.66$2.66-¹
24
1/4" Clear Cast Acrylic Sheet12x24"128.08$28.08-¹
25
1/8" Clear Cast Acylic Sheet12x24"115.76$15.76$15.76
26
1/4" Off White ABS4x6"14.37$4.37-³
27
1/4" MDF24x24"13.92$3.92$3.92
28
1/2" Plywood8x8"11.875$1.88-²
29
1/2" Fiberboard2x6"20.21$0.42-²
30
3/4" Wood1x18"11.99$1.99-²
31
PLA 3D Printer Filamentg--⁵
32
3/64" Stranded Steel Wire1in10.01$0.01-¹
33
Electrical
34
Adafruit Motor Shield V2121.9$21.90-⁶
35
Arduino Uno R3119.95$19.95-⁷
36
12V Power Supply18.99$8.99-⁶
37
Female DC Jack Power Adapter10.45$0.45-⁶
38
Round Prototyping Board15$5.00-⁴
39
200ohm Resistor10.05$0.05-⁴
40
25k Resistor10.18$0.18-⁴
41
IR Reflective Sensor13.86$3.86-⁶
42
Limit Switch12.93$2.93$2.93
43
Toggle Switch16.53$6.53$6.53
44
Vigor Pecision BO-1 Gearbox16.95$6.95-¹
45
Colored Solid Core Wire30"30.32$0.96-⁴
46
Heat Shrink Tubing6"10.162$0.16-⁶
47
Misc
48
1/2" Shaft Flanged Sleeve Bearing
3/4x1"22.28$4.56$4.56
49
7/16" Shaft Sleeve Bearing
9/16x1.0"
30.93$2.79$2.79
50
Small Threaded Stem Furniture Glides
1"40.9925$3.97$3.97
51
Knitting Machine Latch Needles300.4686$14.06$23.43
52
Vibra-Tite Reusable Threadlocker0.17oz13.68$3.68$3.68
53
Fishing Line12"2.50.0167$0.04-⁷
54
Small Used 3D Printer Spool14.95$4.95-⁵
55
Vintage DK Yarn3.5oz28.5$17.00$17.00
56
Mirror Finish Spray Paint6oz18.47$8.47$8.47
57
Paperclips300.005$0.15-⁶
58
Hot Glue Sticks10.124$0.12-⁶
59
Canola Oil2 drops30<0$0.00-⁷
60
SUBTOTAL
$223.62$117.51
61
62
----- TESTING ITERATIONS -----
63
Fasteners
64
4-40 Socket Head Cap Screw *1/4"200.085$1.70-¹
65
1/2"200.085$1.70-¹
66
"5/8"200.083$1.66-¹
67
"3/4"200.084$1.68-¹
68
"1"200.075$1.50-¹
69
"1.25"50.5$2.50-⁶
70
4-40 Socket Head Countersink Screw *
1/2"100.08$0.80-¹
71
"3/4"100.091$0.91-¹
72
"1"100.389$3.89-¹
73
4-40 Low Profile Machine Nut *500.024$1.20-⁶
74
6-32 Socket Head Cap Screw1/4"40.085$0.34-¹
75
6-32 Socket Head Countersink Screw
1/4"40.088$0.35-¹
76
6-32 Jam Nut80.098$0.78-¹
77
1/4"-20 Jam Nut40.148$0.59-¹
78
3/8"-16 Jam Nut50.135$0.68-¹
79
1/2"-13 Jam Nuts40.013$0.05-¹
80
Steel Corner Brackets3/4"40.56$2.24-⁶
81
Satin Brass Corner Braces3/4"40.56$2.24$2.24
82
Washers200.1$2.00-⁶
83
#4 Nylon Spacer *1/4"40.079$0.32-⁶
84
"3/8"40.079$0.32-⁶
85
Servo Mounting Screw10.81$0.81-¹
86
Finishing Nail1"40.022$0.09-⁷
87
Stock
88
1/4" Brass Tube12"12.83$2.83-¹
89
1/2"-13 Plastic Threaded Rod12"15.88$5.88-¹
90
(3/8"-16tpi Threaded Rod)12"12.87$2.87$2.87
91
(3/8" Round Rod)12"25.78$11.56$11.56
92
9mm Round Rod12"22.66$5.32-¹
93
1/4" Clear Cast Acrylic Sheet12x24"228.08$56.16-¹
94
1/8" Clear Cast Acrylic Sheet6x12"15.46$5.46-¹
95
(1/4" Off White ABS)4x6"14.37$4.37-³
96
1/4" Black ABS4x6"14.37$4.37-³
97
1/8" Plywood6x12"10.65$0.65-²
98
(1/2" Plywood)12x18"14.25$4.25-²
99
(1/2" Fiberboard)6x6"10.63$0.63-²
100
(1/2" Plywood)8x8"11.875$1.88-²
101
(1/2" Fiberboard)2x6"20.21$0.42-²
102
3/4" Wood1x6"10.77$0.77-²
103
2x4" Wood6"10.164$0.16-²
104
Cardboard (assorted)12x24"11.5$1.50-⁷
105
PLA 3D Printer Filamentg--⁵
106
3/32" Stranded Steel Wire*30"10.3$0.30-¹
107
3/64" Stranded Steel Wire*12"10.12$0.12-¹
108
Electrical
109
Adafruit Motor Shield V2121.9$21.90-⁶
110
Arduino Uno R3119.95$19.95-⁷
111
12V Power Supply18.99$8.99-⁶
112
Round Prototyping Board15$5.00-⁴
113
Breadboard12.97$2.97-⁷
114
200ohm Resistor10.05$0.05-⁴
115
25k Resistor10.18$0.18-⁴
116
IR Reflective Sensor23.86$7.72-⁶
117
Momentary Push Button10.022$0.02-⁶
118
Servo Motor13.36$3.36-⁶
119
Vigor Pecision BO-7 Gearbox16.95$6.95-¹
120
Vigor Pecision BO-1 Gearbox26.95$13.90-¹
121
Colored Solid Core Wire24"30.25$0.75-⁴
122
Alligator Clip20.531$1.06-⁷
123
Heat Shrink Tubing6"10.162$0.16-⁶
124
Electrical Tape24"10.139$0.14-⁶
125
Misc
126
60-20 cCompound Plastic Gear10.25$0.25-¹
127
Small Threaded Stem Furniture Glides
1"40.9925$3.97$3.97
128
Knitting Machine Latch Needles100.4686$4.69$23.43
129
Fishing Line12"1.50.0167$0.03-⁷
130
Small Used 3D Printer Spool14.95$4.95-⁵
131
DK Yarn 2oz17$7.00-⁷
132
Worsted Yarn5oz19.5$9.50-⁷
133
Colored Cotton Twine1oz13.5$3.50-⁷
134
Small Springs*50.07$0.35-¹
135
Paperclips*120.005$0.06-⁶
136
Printer Paper8.5x11"50.01$0.05-⁷
137
Double Sided Tape"1"50.05$0.25-⁷
138
Rubber Bands20.15$0.30-⁷
139
Hot Glue Sticks*100.124$1.24-⁶
140
Canola Oil2 drops7<0$0.00-⁷
141
SUBTOTAL
$267.08$44.07
142
143
TOTAL$400.24$123.72
*qty estimated in excess
¹Acquired from ME stockroom
²Acquired from mini wood shop scraps
³Acquired from metal shop scraps
⁴Acquired from in ECE stockroom
⁵Acquired from 3D printer space
⁶Aquired from PoE supplies
⁷Acquired from other students