66. in 1 month, a plumbing contractor uses 1,200
feet of 1/2-inch copper pipe at $8 per 20-foot
length, 450 feet of 3/4-inch copper pipe at
$11 per 20-foot length, 310 feet of 1-inch
copper pipe at $9 per 10-foot length, 510 feet
of 4-inch plastic pipe at $4 per 10-foot length,
and 264 feet of 112-inch plastic pipe at $3 per
10-foot length. what is the total amount he
paid for pipe for that month?