The answer is A. If the number of T-shirts is t, then you substitute the t in each equation and solve for all the numbers.
f(t)= 17+13t f(t)= 17+13t f(t)= 17+13t
f(t)= 17+13(12) f(t)= 17+13(17) f(t)= 17+13(22)
f(t)= 17+156 f(t)= 17+221 f(t)= 17+286
f(t)= 173 f(t)= 238 f(t)= 303
