Finally, I see the ability to report gas prices. However, the functionality is still useless: it automatically completes last digit to be '9' and reports that entered price is not valid. Seems, it uses USA defaults, and assumes gas prices per gallon, while in Canada gas prices per liter and shouldn't be rounded.
In general, Waze developers and community should understand that Canada is not US. All the defaults should be different. For example, default distance (should be in meters, not miles).