Human: Brenda volunteered to make 3 trays of banana pudding for the family reunion.  Each tray of banana pudding would need 80 wafer cookies.  A box of wafer cookies only had 60 cookies per box.  Each box costs $3.50.  How much will it cost her to buy just enough boxes for 3 trays of banana pudding? Assistant:
Every tray needs 80 cookies and she's making 3 trays so 8*3 = 240
Every box of cookies has 60 cookies. She needs 240 cookies so 240/60 = 4 boxes
The boxes cost $3.50 each and she needs 4 boxes so 3.50*4 = $14.00