cost per linear feet and square feet. what is the cost of constructing a fence 6 feet, 6 inches, high around a lot measuring 90 feet by 175 feet, if the cost of erecting the fence is $1.25 per linear foot and the cost of materials is $0.825 per square foot of fence? real estate math. 4/24/2016 | carly from greenwood, in. subscribe.