To find the number of quarter dollars he should pay, first calculate out the amount of money this would cost. For this, we can multiply the cost of the item by the number of them that we got and then add them all together.
Burgers
2 * 1.75 = 3.50
Cake
2 * 1.50 = 3.00
Soda
1 * 1.00 = 1.00
Total
3.50 + 3.00 + 1.00 = 7.50
Now to find out how many quarters he should pay, we divide the amount by .25.
