A shopkeeper mixes two varieties of tea, one costing Rs. 35 per k.g. and ‘anotherat Rs. 45 per kg. in the ration 3:2. If he sells the mixed variety at Rs. 41.60 per k.g., percentage of his gain or loss is:

A

4 % gain

B

4 % loss

C

6$$\frac{2}{3}$$ % gain

D

6$$\frac{2}{3}$$ % loss