I am having a summer party, i need help trying to figure stuff out like cost, which alcoholic drinks, etc.?

I am on a low budget. Ill probably have roughly $100-200. I have a decent place to throw it at. There will be around 15-25 people here. Just alittle kickback. So far i got music and speakers covered. I need to know what kinda drinks i should get typically low cost but as of now ill take anybodys opinion! I got all the little stuff already such as cups and beer pong table. If im messing anything lemme know! Thank you :) please no alcohol is bad comments i ONLY need helpful ones :)