can someone help me on part b

Cakculate how much joint cost would be allocated to each product when using (1) the sales value at split-off method and (2) the NRV method. (Round proportion to 2 decimal ploces, eg. 0.25 and final answers to 0 decimal ploces, e.g. 5, 125.) (1) The sales value at split-off method Assuming that all quantities produced are sold, calculate gross margin for the division if both Grade 1 and Grade 2 products are sold at the split-off point and the sales value at split-off method is used to allocate joint costs. As the manager of the granite-crushing division, George has just recently started evaluating product profitability. The joint process for his division generates Grade 1 and Grade 2 granite pieces. Both grades at this point can be sold as -is, or Grade 2 can be processed further into Grade 3 (a stabilizer is added while it's further processed into very fine pieces). The quantities, costs, and sales values for: the different grades of product are as follows