Landmann Corporation's relevant range of activity is 7,000 units to 11,000 units. When it produces and sells 9,000 units, its average costs per unit are as follows: Average Cost per Unit Direct materials $ 6.35 Direct labor $ 4.10 Variable manufacturing overhead $ 1.35 Fixed manufacturing overhead $ 13.50 Fixed selling expense $ 2.25 Fixed administrative expense $ 1.80 Sales commissions $ 1.00 Variable administrative expense $ 0.45 For financial reporting purposes, the total amount of product costs incurred to make 9,000 units is closest to: Select one: O a. $227,700 O b. $236,700 O c. $106,200X O d. $121,500