How do I check the right price of LPG?

CYLINDER ​REFILL ​FIRST CHARGE
​3kg ​Ugx 30,000/= ​Ugx 160,000/=
​6kg ​Ugx 57,000/= ​Ugx 200,000/=
​12.5kg ​Ugx 118,000/= ​Ugx 328,000/=
​38kg ​Ugx 265,000/= ​Ugx 655,000/=
Is this useful ?