Sales (B, units at 520) Variable manufacturing costs Fixed manufacturing costs Variable administrative expenses Fixed selling and administrative expenses Operating income $ 160,000 $6,00 15.000 12.000 20,000 (133.960) $ 27,00 A foreign company offers to buy 2000 units at $14 per unit. In addition to enable manufacturing and ar purchase of special tools Markson's annual productive capacity is 12,000 units of Markson accepts this Multiple Choice C ) increase by $3.500 c ) Decrease by $5,650 Decrease by 1600