i have oart a complete but i dont know what im doing for part b .. looking for guidance

How much cost does Sheridan-T have tied up in each of these T-shirts? If it normally sells these shirts for $12 to the retailer, how much gross margin per unit does it generate on these sales? (Round answers to 2 decimal ploces, eg. 15.25.) Total cost Junit Gross margin At the end of October, Maria lamented the company's situation: in the middle of production of Sheridan-T's most popular long-sleeve T-shirt, the company ranout of its usual collars, purchased from one main supplier. That supplier was also sold out. Sheridan-T could get a slightly different premade collar, from a new supplier; at the same cost. So Maria went ahead with the order, hoping it wouldn't delay production or affect the quality of the shirts. As it turned out, the new collars failed Sheridan-T's quality control testing. Stuck with unwearable T-shirts, the company was also in a bind with its retail outlets, which wanted more shirts to sell! The costs to produce this most recent batch of shirts is as follows. Scrambling, Maria has gone back to her original supplier of collars, which thankfully now has a large quantity it can ship to her. These collars cost $0.45 each, and the company can get enough of them to go back and fix the collars on the recently ruined batch, plus put some into the warehouse for a future batch. In order to fox the botched T-shirts, though, Sheridan-T will need to incur an extra $2 per shirt in labor costs to carefully remove the bad collars and re-attach the new ones. These reworked shirts should still besalable to retailers at the regular selling price. How much gross margin per unit will Sheridan-T generate if it fixes and sells these reworked shirts? (Round onswer to 2 decimal places, eg. 15.25.) eTexthbok and Media