solution with explanation please

Deming & Sons manufactures four grades of lubricant, W-10, W-20, W-30, and W-40, from a joint process. Additional information follows: If Processed Further Product W-10 W-20 W-30 Units Produced 44,800 32,000 25,600 25,600 128,000 Sales Value at Split-Off $268,000 230,000 154,000 116,000 $768,000 Additional Costs Sales Values $ 28,700 $292,000 23,000 268,000 15,400 192,000 9,600 128,000 $ 76,700 $880,000 W-40 Required: Assuming that total joint costs of $268,800 were allocated using the sales value at split-off (net realizable value method), what joint costs were allocated to each product? (Do not round intermediate calculations.) Product NRV at Split- Off Joint Costs Allocated W-10 W-20 W-30 W-40