This issue is a variant of Zap Comix (The Print Mint Inc, 1969 series) #9.
Early printings by Print Mint. Later printings by Last Gasp. The Jay Kennedy Price Guide lists only Last Gasp as the publisher of this reprint
Underground Comix are known for using different prices, covers (art or color variations) and/or interior content to distinguish between printings.
The Print Mint-
1st print has 1.00 USD cover.
The Print Mint & Last Gasp-
2nd print has 1.50 USD cover
3rd print has 2.50 USD cover. 4th print has 2.95 USD cover. 5th print has 4.95 cover.
Sequence on inside front cover.