Lawson bought 3 identical shirts online for a total cost of $71.83 including a flat rate of $7.99 for shipping. Which equation will find the cost of each shirt, s?
A 3s - $7.99 = 71.83
B -3(s - $7.99) = 71.83
C 3+ $7.99s= 71.83
D 3(-s + $7.99) = 71.83