cagayan de oro market

i used to go to our local market when i am not tired. i am so surprised when the market vendor of a vegetable (one already cut ready for cooking) they sell two (@) packs at php 15.00 and if you buy only one pack it cost php 10.00. i was so disgusted thinking jokingly what kind of strategy is this ? or is it right to say they don't know simple math? how would we think of them? i didn't buy at that time.

in the public market when you buy one kilo of fish and it cost php 25.00. if you are goind to buy one half 1/2 kilo only the price is15.00. I asked myself.... what is this? i really couldn't imagine what are they doing? is this robbery with the knowledge of the one concern?

with this experience i tell myself better to buy in the malls, superstores or something of the like than in our public market. i have also noticed that when weighing the goods we are buying they are cheating by i don't know