A businessman bought in a piece of clothing for 70 yuan and sold it at an additional price of 12 yuan. Later, it was found that the one hundred yuan bill paid by the buyer was a counterfeit bill, and the businessman was very sad. Please help this unlucky businessman calculate how much he lost on this dress.
一位商人花70元进来一件衣服，加价12元售出．后发现购买者支付的那张一百元是假钞，商人很难过．请你帮这位倒霉的商人算一算，在这件衣服上一共损失了多少元．
<gadget id="calculator">70 + 12</gadget>
<output>82</output>

<gadget id="calculator">100 - 82</gadget>
<output>18</output>

<gadget id="calculator">70 + 18</gadget>
<output>88</output>

<result>88</result>