9. Working with Numbers and Graphs Q9 If total variable cost is $115 and average variable cost is $5, quantity of output equals Now, consider the following data: Quantity of Output (Units) 4 5 Total Cost (Dollars) 120 140 The marginal cost of producing the fifth unit is $ units. If total variable cost is $30 when quantity of output equals four units, then average fixed cost is $ As quantity of output increases, average fixed cost will at this quantity