1st piece is the longest
2nd piece is 24 7/16 + 12 5/ 16 = 36 3/4 inches long
3rd piece is 24 7/16 inches
2nd piece is 7/8 as long as first piece so divide the length of the 2nd piece by 7/8
3 3/4 / 7/8 = 42 inches
A) 1st piece is 42" long
B) now add them all: 42 + 36 3/4 + 24 7/16 = 103 3/16 inches total
C) 103 3/16 inches / 12 = 8.6 feet
8.6 x 4 = 34.4 feet, he has 32 feet so he does not have enough to cut 4 more of each size.