calculate each allocated cist, inventory and gross prifit using NRV method

A telecommunication manufacturing company produces product X, product Y and product Z. Last year the company produced X,Y and Z with total joint cost IDR 718 billion. The company also conduct separable processes for product X,Y and Z with each cost IDR 50 Billions, IDR 30 Billions and IDR 18 Billions In this period, the company sold product X,Y, and Z as follows: Calculate each allocated cost, inventory cost and gross profit using NRV Method