Large economy size and quantity rates should never be a problem in the super maket if you learnt your "time tables" in school. (3rd class?)
In more cases than not the price for the small packets appears to be less than the larger packets for the same quantity
eg. common pricing 2.99 for 500G and 5.99 for 1Kg
The other one to watch is more complicated;
eg 2.99 for 500G and 4.50 for 750G.
This requires (5th class?) maths to solve.
Barry
