F2 Decision Making

Hi, please try and provide the solution for the question as below, thanks.

A company is considering the cost for a special order. The order would require 1250kg of material D.
This material is readily and regularly used by the company. There are 265kg of material D in stock which cost $795 last week. The current market price is $3.24 per kg.

Material D is normally used to make product X. Each unit of X requires 3kg of material D and, if material D is cost at $3 per kg, each unit of X yields a contribution of $15.

The cost of material D to be included in the costing of the special order is nearest to

A.3990 B.4050 C.10,000 D.10300