When you went to shopping, you can calculate immediately which is cheaper.For example,which is cheap in 5lb $0.79 and 3lb $0.49?You can see the answer
When you went to shopping, you can calculate immediately which is cheaper.
For example,which is cheap in 5lb $0.79 and 3lb $0.49?
You can see the answer as soon as typing.
(I am not good at English. If there is unnatural expression, please send me an email.)