Colt company owns a machine that can produce two specialized products. Production time for product TLX is two units per hour and for product MTV is four units per hour. The machines capacity is 2,400 hours per year. Both products are sold to a single customer who has agreed to buy all of the company's output up to a maximum of 4,080 units of product TLX and 1,880 units of product MTV. Selling prices and variable costs per unit to produce follow $ per unit product TLX product MTVSelling price per unit $12.00 $7.20Variable cost per unit $3.60 $4.32I'm confused by the one in the chart showing red as wrong not sure what I did wrong

Contribution margin per unit Units produced per hour Contribution margin per production hour Maximum number or units to be sold Hours required to produoe maximum units Hours dedicated to the production of each product Produce most protable units until the market demand has been satised. Units produced for most protable sales mix Contribution margin per unit Total contribution margin