Question

Edwin pays a company $870 every 4 months to clean his company office.How many dollars does edwin pay for cleaning over a 19-month period.

Answer 1

For un month Edwin spent 870/4=217.5$ So for 19 months he will spent 217.5time19 that will be $4132.5

Answer 2

if he pays every 4 months then 19÷4=4.75
4.75×870=4132.5 $
not so sure tho