Makes me wonder..

In a 15km stretch may nadaanan akong 3 petron gas stations.. I usually fill up with XCS so yun ang tinitingnan kong price lagi..

1st petron gas station XCS is at P43.07.
2nd petron gas station XCS is at P41.00.
3rd petron gas station XCS is at P44.**.

If petron can offer XCS as low as P41, why can't they offer the same price sa ibang gas stations nila?

Senxa na po kung mejo stoofid ang Q, hindi ko lang talaga alam ang sagot..
Thanks!