Marj has two $20 bills, three $5 bills, and $4.50 in loose coins in her wallet. If she buys a cake that costs $17.50, how much money will be left in her wallet?
Two $20 bills amount to $20 x 2 = $
<gadget id="calculator">20*2</gadget>
<output>40</output>
40.
Three $5 bills amount to $5 x 3 = $
<gadget id="calculator">5*3</gadget>
<output>15</output>
15.
So, Marj has $40 + $15 + $4.50 = $
<gadget id="calculator">40+15+4.5</gadget>
<output>59.5</output>
59.50 in her wallet.
If she buys a cake, she will be left with $59.50 - $17.50 = $
<gadget id="calculator">59.5-17.5</gadget>
<output>42</output>
42.

<result>42</result>