Cost of one Hamburger = $2.50
Cost of a packet of Fries = $1.50
Cost of one Soda = $1.00
Total cost = The sum of his meal
Total cost = $ [ 2(2.50) + 1.50 + 1.00 ]
Total cost = $ ( 5.00 + 1.50 + 1.00 )
Total cost = $ 7.50
The total cost of his meal was $7.50 .