The best and most correct answer among the choices provided by your question is the fourth option or letter D. The expression that represents Graham's sales is 2a − 6. Twice the sales of Adrianne, deducted by 6 should be Graham's sales.
The pricing of the boxes seems to be consistently 2.40 per box. Ethan's cost is .. 52.80 = 2.40 * (# of boxes) .. 52.80/2.40 = (# of boxes) .. 22 = # of boxes
