Final answer:
The cafeteria could have saved $356 if they bought the pizza last week.
Step-by-step explanation:
To find out how much money could be saved if the pizzas were bought last week, we need to calculate the difference in price per pizza and then multiply it by the number of pizzas.
Price per pizza last week: $2.00
Price per pizza this week: $3.78
Difference in price per pizza: $3.78 - $2.00 = $1.78
Number of pizzas: 200
Amount saved = Difference in price per pizza x Number of pizzas
Amount saved = $1.78 x 200 = $356
The cafeteria could have saved $356 if they bought the pizza last week.