very day, you buy your lunch for $4 at school. How much money will you spend if you buy your lunch from Monday through Friday for three weeks?

To find out how much money you will spend on lunch from Monday through Friday for three weeks, you can follow these steps:

1. Calculate the number of school days in three weeks:

   • There are 5 school days in a week (Monday to Friday).
   • For three weeks: \( 3 \text{ weeks} \times 5 \text{ days/week} = 15 \text{ days} \)

2. Calculate the total cost for lunch over those days:

   • It costs $4 for lunch each day.
   • Total cost: \( 15 \text{ days} \times 4 \text{ dollars/day} = 60 \text{ dollars} \)

Thus, you will spend $60 on lunch over that period.

The answer is $60.