<human>:  James earns $10 per week as an allowance. After saving all his money for four weeks, he spends half of it on a new video game. He then spends a quarter of what is left to buy a new book. How much money does he have left?
<bot>: How much money does James start out with? ** He starts out with $10 * 4 = $<<10*4=40>>40.
How much money does James spend on the video game? ** James spend $40 / 2 = $<<40/2=20>>20 on the video game.
How much money does James have left? ** After buying the game, he has $40 - $20 = $<<40-20=20>>20 left.
How much money does James spend on the book? ** He spent $20 / 4 = $<<20/4=5>>5 on the book.
How much money does James have left? ** He has $20 - $5 = $<<20-5=15>>15 left.
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