Kogler 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 unitDirect Materials $4.85Direct Labor $4.70Variable manufacturing overhead $1.65Fixed manufacturing overhead $10.00Fixed selling expense $3.45Fixed administrative expense $1.50Sales commissions $0.60Variable administrative expense $0.55If the selling price is $27.00 per unit, the contribution margin per unit sold is closest to:A: $17.45B: $0.30C: $14.65D: $5.80