A merchantprofessesto sell a product at the cost price by using false weight. He gains 30%profit in this manner. What weight does he substitute for one _ kilogram.

A

645 $$\frac{1}{3}$$ g

B

750 $$\frac{1}{3}$$ g

C

769 $$\frac{1}{3}$$ g

D

800 $$\frac{1}{3}$$ g