Melony makes $21 of profit every time she sells 3 shirts and four times as much profit when she sells two pairs of sandals. How much profit will she make if she sells 7 shirts and 3 pairs of sandals?
Use reasoning to answer the following question.
175
Melony makes $21 * 4 = $84 of profit for two pairs of sandals.

Melony makes $84 / 2 pairs = $42 of profit per pair of shoes.

Melony makes $21 / 3 shirts = $7 of profit per shirt.

For seven shirts, Melony will make 7 shirts * $7 = $49 of profit.

For three pairs of sandals, Melony will make 3 pairs * $42 / pair = $126 of profit.

Melony will make a total of $49 + $126 = $175 of profit.

.

Therefore, the answer is 175