Calculate the estimated cost of production of by-products X and Y at the point of separation from the main product. Selling expenses amount to 25 per cent of the total works cost, that is, including...

Calculate the estimated cost of production of by-products X and Y at the point of separation from the main product.

Selling expenses amount to 25 per cent of the total works cost, that is, including both preseparation and post-separation works cost.

Selling prices are arrived at by adding 20 per cent of the total of all costs, that is, the sum of work costs and selling expenses.