please help

Your company regularly uses material X and currently has in stock 500kgs for which it paid kshs 1,500 two weeks ago. If this were to be sold as a raw material, it could be sold today for kshs 2.00per kg. You are aware that the material can be bought on the open market for ksh 3.25 per kg, but it must be purchased in quantities of 1000kg. You have been asked to determine the relevant cost of 600kgsof material X to be used in a job for a customer. The relevant cost of the 600kg is: Select one: a. Kshs 1,325 b. Kshs 1,825 0 c. Ksh 1,950 d. Kshs 3,250