Dana and monique are dog groomers dana’s workday is 10 hours and monique’s workday is 8 hours dana and monique each work 40 hours per week.

Dana's workday is 10 hrs...and she works 40 hrs per weekso she works 4 days
Monique's workday is 8 hrs...and she works 40 hrs per weekso she works 5 days

Dana : she works 4 days and gets paid $ 12.75 per dog...and she grooms 15 dogs per dayso Dana makes : 4(12.75 * 15) = 4(191.25) = $ 765

Monique : she works 5 days and gets paid $ 12.75 per dog...and she grooms 10 dogs per dayso she makes : 5(12.75 * 10) = 5(127.50) =
$ 637.50

so the difference between their weekly earnings is : (765 - 637.50) =
$ 127.50 <===

Not so sure about this one sorry.