Answer $9.00 per pound for almonds
Reason
First, 70# x $3.50 = $245 of peanuts
Second, $515 total cost - $245 of peanuts = $270 of almonds
Third, we know 100# - 70# peanuts = 30# of almonds
Last, $270 cost of almonds divided by 30# of almonds = $9.00 per pound for almonds