A show room offers a 10% discount on a microwave, whose marked price is ₹8,000, and also gives a blender worth ₹1,200 as a complimentary gift with it. Even then, the showroom earns a profit of 20%. The cost price per microwave is:
A. 7200
B. 6000
C. 5000
D. 4000
Answer: Option C