An Indian Manufacturer Establishes That Its Total Cost Per Item

An Indian manufacturer establishes that its total cost per item function (in Indian Rupees, INR) is given by C = 6000x^-1 + 2.5+ 0.03x. Work out the volume that minimises average cost (cost per item) .

A) 2,000
B) 20,000
C) 200,000
D) 2,000,000