Bill of Materials and Trading

Here is a list of our Bill of Materials:(all from either Lab or Bob's WorkShop)

2 lbs of PVC block: $2.06

Steel used for our Wedge: $16.89

PVC Tube-3.5"diameter 5"tall: $1.50

Aluminum stock 1.5" by 3 feet: $8.21

Aluminum 1"x 1" stock kit: $4.71

Steel Axel-from Bob: $2.89

Total: $36.26

Here are our trades:

1. 1/4 inch diameter aluminum rod from team 21

Bearings

2. 12" Nylon rack and 3/8" diameter rod to Mark(GSI)

24" Al square tube stock 1"x1", 1/8"wall in return

3.28 D.P.,72 Teeth, 20° Pressure Angle, Acetal/No insert spur gear