Buffo Company fabricates metal folding chairs. Data concerning the company's revenue and cost structure follow: Selling price per unit $37 Manufacturing cost $3,900 per month plus $16 per unit Administrative expense $2,070 per month plus $1.8 per unit Sales commissions 16% of sales Advertising expense $8,460 per month If Buffo plans to produce and sell 4,700 units next month, the expected contribution margin would be: A. $62,416 B. $128,166 C. $58,416 D. $111,484