For the pieces I need it is gonna cost: $7 for the primer, $4 for a 20 pack of 1/2" cpvc ells, $ 3 for the 1 1/2 p-trap. I have some plywood at my my house but it is 3/4", so i have to contact my mentor to see if that would work. I plan to meet him on Saturday if I have all the supplies.