<human>:  Alex has 4 new shirts. Joe has 3 more new shirts than Alex. If Ben has eight more new shirts than Joe, how many new shirts does Ben have?
<bot>: How many new shirts does Joe have? ** Joe has 4+3=<<4+3=7>>7 new shirts.
How many new shirts does Ben have? ** Ben has 8+7=<<8+7=15>>15 new shirts.
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