Why Refill Pack Is The Most Expensive One?

2 days ago, Mr Yap and I went to Alamanda. We tried to buy the movie tickets of "Wanted" but full house.



Therefore, after dinner, we went to Carrefour to buy some household stuff.



This is the refill pack of concentrated liquid detergent (1.8L, RM7.99), that means it is RM4.438/L :

This is the medium size of concentrated liquid detergent (3L, RM12.79). It is RM4.263/L

This is the large size of concentrated liquid detergent (5L, RM19.99). RM3.998/L





Why we need refill pack? It is because we hope to exclude the cost incurred by the detergent bottle.



Obviously, refill pack is the most expensive one. Damn it.



Finally, we bought the large size.



Friends, in the future, before you buy anything, please calculate the price per unit first. Sometimes, the size that you think it is cheaper may end up the most expensive one.