A dishonest dealer sells his goods at 10 % loss on cost price and uses 30 % less weight.
What is his profit or loss percentage ?

A

$$28\frac{4}{7}$$ % loss

B

$$28\frac{3}{7}$$ % profit

C

$$28\frac{3}{7}$$ % loss

D

$$28\frac{4}{7}$$ % profit