Answer:
Jennie pay would be
300 on sales 
Step-by-step explanation:
Given
Jennie earnings per week = 
On sales of
pay = 
Commission on
sale = pay on
- earning per week= 
Commission on
sale = 2
Commission on
sale =
Now Total payment on sale of
= Jennie earnings per week + Commission on
sale = 
Jennie pay would be
on sales 