It's saying my gross margin percentage is wrong, can you help me with that? Thanks!

The Rainbow Oil Company buys crude vegetable oil. Refining this oil results in four products at the splitoff point. A, B, C, and D. Product C is fully processed by the splitoff point. Products A, B, and D can individually be further refined into Super A, Super B, and Super D. In the most recent month (December), the output at the splitoff point was as follows: (Click the icon to view the information.) Read the requirements. - More Info Product A, 250,000 gallons Product B, 95,000 gallons Product C, 45,000 gallons Product D, 110,000 gallons . The joint costs of purchasing and processing the crude vegetable oil were $40,000. Rainbow had no beginning or ending inventories. Sales of product C in December were $60,000. Products A, B, and D were further refined and then sold. Data related to December are as follows: Separable Processing Costs to Make Super Products Revenues Super A 170,000 $ 250,000 Super B 60,000 100,000 Super D 5,000 25,000 Rainbow had the option of selling products A, B, and D at the splitoff point. This alternative would have yielded the following revenues for the December production: Product A, $40,000 Product B, $30,000 Product D, $70,000 Requirement 1. Compute the gross-margin percentage for each product sold in December, using the different methods for allocating the $40,000 joint costs. a. Sales Value at Splitoff. Begin by entering the amounts in the table and allocate the joint costs. (Enter the weights to four decimal places.) Sales value of total Joint costs allocated production at splitoff $ 40,000 Weighting 0.2000 $ A 8,000 B 30,000 0.1500 6,000 C 60,000 0.3000 12,000 70,000 0.3500 14,000 D 200,000 1.0000 $ 40,000 Compute the gross margin percentage using the sales value at splitoff method to allocate the joint costs. (Enter a "0" for any cells with a zero balance. Round the percentages to two decimal places, X.XX%. Use parentheses or a minus sign when entering negative amounts.) Super B Super D 25,000 Revenues 60,000 Super A 250,000 8,000 170,000 100,000 6,000 Joint costs 12,000 14,000 60,000 0 Separable costs 5,000 72,000 34,000 48,000 6,000 Gross margin 28.80 34.00 8.00 Gross margin percentage % % % 24.00 %