Answer:
Unfortunately, your question does not make sense. Please clarify, I don't know how to answer it like that.
Explanation:
Gross income. they are incomes before taxes or adjustments
The total cost for this certain activity level can be calculated by substituting 4000 to the x of the equation given above,
y = 7000 + 1.8(4000)
y = 14200
Thus, the total cost of the activity level is $14,200.