please help with part D! part D is the second photo woth the red incorrect message. I have already very clearly got the rest.

Sheffield Paints makes various interior and exterior paints for its customers, but its current focus is on its top-selling interior brand. Sheffield produces the paint in its mixing department and then transfers the paint to the canning department. The following information is presented for the canning department in March recognizing that the company adds sits conversion costs evenly throughout the process. One unit is one gallon of paint. For the units completed in March, what was the final cost per gallon? (Round answer to 2 decimal places, eg. 15.25.) The cost per gallon - The total cost of units completed and the total cost of units in ending WIP Inventory. Present Sheffield's WIP Inventory-Canning T-account for the period, showing all debits and credits that would have existed or would have been recorded in the account in March, and determine its ending balance