A cement manufacturer has supplied the following data: Tons of cement produced and sold Sales revenue Variable manufacturing expense Fixed manufacturing expense Variable selling and administrative expense Fixed selling and administrative expense Net operating income 255,000 $1,045,500 $438,000 $235,000 $72,000 $225,000 $75,500 What is the company's unit contribution margin? (Do not round your intermediate calculations.) $2.00 per unit $0.12 per unit $2.10 per unit $4.10 per unit