question confusion

A company has produced the following budget based on orders for the domestic market:
£
Sales (4000 units x £5 ) 20,000
Cost of Sales:
Direct Material (4000 units) 2,000
Direct Labour 8,000
Variable Overhead 2,000
Fixed Overhead 6,000
Profit 2,000

At production of 4,000 units the company still has spare capacity. However the amount of extra raw materials available is limited to £375.

The company is investigating two options;
1) To sell the additional standard units abroad where the selling price and variable costs would be the same as at home and there would be no additional fixed costs.
2) To produce 200 deluxe models for the home market and sell them at £X each. These would require twice the amount of materials as the standard product. Any materials left over could still be use for standard units which could be sold abroad at the same price as the home market.

Required.
What is the minimum price that should be charged for the deluxe models