According to a school’s budget, the money spent on buying new equipment and money spent on maintenance of old equipment should be in the ratio of $3:8$. In one year, if the money spent on buying new equipment is ${\$58{,}800.00}$, how much money was spent on maintenance of old equipment? Solution: In one year, if the money spent on buying new equipment was ${\$58{,}800.00}$, was spent on maintenance of old equipment.