Answer:
63
Explanation:
5 × 4 = 20
5 meaning the days in the weeks
4 meaning the number of weeks
20 × 3.15 = 63
3.15 meaning the amount of dollars she spends on lunch each day.
$63
School week is 5 days.
5 x 4 = 20.
Therefore in a month Juan buys 20 lunches.
20 x 3.15 = 63
Monthly expense is $63
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