Irene buys a talking doll for $11.66 and batteries for $3.22. She pays with a $30 bill. Estimate how much change she should get ?

The correct answer is:

Total money spend by Irene = $11.66 + $3.22 = $14.88
Total change she should get is = $30 - $14.88 =$15.12

Cost of doll=$ 11.66
Cost of batteries =$ 3.22
Total cost = 11.66 + 3.22 =$ 14.88
Amount paid = $ 30
Amount to be returned = $ 30- total cost= $30 - $ 14.88= $ 15.12$