a manufacturing company makes and sells a single product x.budgeted sales next year are 20000 units of product x,each unit of product x consumes 3 kilos of material b. a decision has been taken that inventory of material b will be increase from 9000 kilos to 18000 kilos by the end of the year,and inventory product x will be reduce from 5000 to 4000 units during the year.what is the budgeted material purchase quantity fro material B?