Since i bought 1 tray of chips, and a cake, the equation is:
[tex]$9.25 + 24 = 33.25[/tex]
Now for the pizza, since i bought 4 pizzas for 10.50 each, with 1/3 off. The equation is:
[tex]10.50 * 4 = 42[/tex]
The special is 1/3 for the pizzas:
[tex]1/3 * 42 = 14[/tex]
Now adding the prices its:
[tex]33.25 + 14 = 47.25[/tex]
The total: $47.25
you're welcome :D