<human>:  Dean's mother gave him $28 to go to the toy store. Dean bought 6 toy cars and 5 teddy bears. Each toy car cost $2 and each teddy bear cost $1. His mother then feels generous and decides to give him an extra $10. How much money does Dean have left?
<bot>: How much did the toy cars cost? ** The cost of the toy cars is 6 cars × $2/car = $<<6*2=12>>12.
How much did the teddy bears cost? ** The cost of the teddy bears is 5 bears × $1/bear = $<<5*1=5>>5.
How much did the toys cost? ** The total cost of the toys is $12 + $5 = $<<12+5=17>>17.
How much money does Dean have left? ** Adding the two amounts of money his mother gave him, we find that Dean has $28 + $10 = $<<28+10=38>>38 to spend.
How much money does Dean have left? ** Dean has $38 − $17 = $21 left.
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