
Mark M. answered 12/06/16
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He lost $100. Although he got back bill he gave out $70 in goods and $30 in change.

Mark M.
How did you determine $170?
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01/18/17
Regina G.
I am thinking $170 (the original $100 was more than likely already from the sell of goods previously purchases). So he had already lost the $100 so the $30 in change was from the original $100 that he had lost. Then he lost the $70 in goods which brings me to the total loss of $170.
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06/26/18
Teresa A.
01/18/17