Tim buys 3 loaves of bread.  Each loaf of bread has 20 slices.  He pays for the 3 loaves of bread with 2 $20 bills.  He gets $16 change.  How much does each slice cost, in cents?
He gave 2*20=$<<2*20=40>>40.
So the total cost was 40-16=$<<40-16=24>>24.
That means each slice costs 24/3=$<<24/3=8>>8.
That means it costs 8*100=<<8*100=800>>800 cents.
So each slice is 800/20=<<800/20=40>>40 cents.
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