Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish between printings.
1st print has 2.50 USD cover. 2nd print has 2.50 USD cover. Says '5 4 3 2' in indicia (not listed in Fogel's guide).
3rd print has 2.95 USD cover. 4th print has 3.95 USD cover. 5th print has 4.95 USD cover.
This issue is a variant of Zap Comix (Last Gasp, 1982 ? series) #11
There exist further variants: