<human>:  Adam has $100 and wants to spend it to open a rock stand. He can buy rocks for $5 each and sell them for $7 each. If he invests all his money in the rock stand but only sells 60% of his inventory, how much money does he lose?
<bot>: How many rocks can Adam buy? ** He can buy 20 rocks because 100 / 5 = <<100/5=20>>20
How many rocks does Adam sell? ** He sells 12 of these rocks because 20 x .6 = <<20*.6=12>>12
How much money does Adam make? ** He makes $84 selling these because 12 x 7 = <<12*7=84>>84
How much money does Adam lose? ** He lost $16 on his business because 100 - 84 = <<100-84=16>>16
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