A shingle roof has a total roof area of 42 squares of roofing. The roof is to have three-in-one shingles, 80 shingles per square, and six nails per shingle. There are 250 nails per pound. The cost of the nails use $35 per 100 lbs. The total cost of the nails is:

A shingle roof has a total roof area of 42 squares of roofing. The roof is to have three-in-one shingles, 80 shingles per square, and six nails per shingle. There are 250 nails per pound. The cost of the nails use $35 per 100 lbs. The total cost of the nails is: