Answer:
The amount of sales in order to meet her goal must be greater than or equal to $20,000
Step-by-step explanation:
Let
x----> represent the amount of sales Liz will need
we know that
The amount of sales for the month multiplied by the commission rate as a decimal plus the fixed amount must be greater than or equal to $2,800 each month
so
The inequality that represent this situation is

solve for x
subtract 2,200 both sides


divide by 0.03 both sides

The amount of sales in order to meet her goal must be greater than or equal to $20,000