Original retail album prices

Anybody remember what the original retail prices were for the U.S. albums? I seem to remember either $2.98 mono/$3.98 stereo or $3.98 mono/$4.98 stereo
for the early single record albums. Don't remember later single album or double album prices.

Any information anyone can provide would be greatly appreciated.

I bought mine in the 80's new at Sound Warehouse, were still less than $10.