Answer :
Let x = the number of hot dogs sold at $1.25 each
Let y = the number of hamburger sold at $1.50 each
Total sales count: x + y = 78
Total sales $: 1.25x + 1.50y = 105.50
Solve for x and y using any method you wish
I get x = 46 and y = 32
Total hot dogs = 46
&
Total hamburgers = 32
Let y = the number of hamburger sold at $1.50 each
Total sales count: x + y = 78
Total sales $: 1.25x + 1.50y = 105.50
Solve for x and y using any method you wish
I get x = 46 and y = 32
Total hot dogs = 46
&
Total hamburgers = 32