ratmice wrote:AndyPoms wrote:ratmice wrote:This assumes that the credit price increase is equal across the board, which it seems to be in my area.
It isn't.... and CT, the legal price of gas is the Credit Price & retailers are allowed to offer (at their own discretion) a discount for cash, and that varies from station to station...
I didn't mean across the board, like every station has the same offset, but that the offset is the same for all grades at each station

So, for EACH STATION, if there is a .09 "penalty" for using credit, then all you would have to do is update the prices, make sure the offset is correct, adjust if necessary, and go on your way.
If there is a different offset for different grades, then it's not as straightforward. However, a simple convention to choose the higher, or lower if you prefer, offset, will get you within pennies of the correct amount.
Sorry, can't do anything about your problem in CT where the credit price the "legal" price, but it doesn't really matter as long as both prices are displayed in Waze, does it?.
The offset can also vary at an individual station... When they first passed the law, most stations went to a 10 cent discount... Now that discount is between 4 & 9 cents at most stations, and some stations change the discount based on the price of gas...
I support posting the Credit price in Waze for the following reasons:
1) It's the HIGHER (or equal) price no matter where you are - I don't want to find the station with the lowest price and be surprised by a higher price just because I'm paying with plastic - a surprise lower price is always better. This is my primary reason.
2) It keeps the system easier - no tracking the difference between cash & credit - and you get a surprise discount.
3) It's the legal price in CT. If you look at the laws in many states, it's the legal price there too - most consumer protection laws prohibit charging an extra fee to use a credit and/or debit card.