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?
Melony makes $21 * 4 = $
<gadget id="calculator">21*4</gadget>
<output>84</output>
84 of profit for two pairs of sandals.
Melony makes $84 / 2 pairs = $
<gadget id="calculator">84/2</gadget>
<output>42</output>
42 of profit per pair of shoes.
Melony makes $21 / 3 shirts = $
<gadget id="calculator">21/3</gadget>
<output>7</output>
7 of profit per shirt.
For seven shirts, Melony will make 7 shirts * $7 = $
<gadget id="calculator">7*7</gadget>
<output>49</output>
49 of profit.
For three pairs of sandals, Melony will make 3 pairs * $42/pair = $
<gadget id="calculator">3*42</gadget>
<output>126</output>
126 of profit.
Melony will make a total of $49 + $126 = $
<gadget id="calculator">49+126</gadget>
<output>175</output>
175 of profit.

<result>175</result>