Single layer cake slices cost $4 x 7 = $<<4*7=28>>28.

Double layer cake slices cost $7 x 5 = $<<7*5=35>>35.

All the cake slices together cost $28 + $35 = $<<28+35=63>>63.

He will receive change of $100 - $63 = $<<100-63=37>>37.

# Answer

37
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
At the patisserie, a single layer cake slice is $4 and a double layer cake slice is $7.  Dusty buys 7 single layer cake slices and 5 double layer cake slices.  If he pays with a $100 bill, how much change does he receive?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
37
At the patisserie, a single layer cake slice is $4 and a double layer cake slice is $7.  Dusty buys 7 single layer cake slices and 5 double layer cake slices.  If he pays with a $100 bill, how much change does he receive?
train