Mrs Doubtfire is planning to place a fence around her backyard. The fencing costs $1.95 per yard. She buys f yards of fencing and pays $3.50 in tax. If the total cost of the fencing is $81.50, write an equation to represent the situation.
A. 3.50f + 1.95= 81.50
B. 1.95f + 3.50 = 81.50
C. 1.96f - 3.50= 81.50
D. 3.50f - 1.95 = 81.50