How much alcohol for party??

Hey guys, I’m organizing a party and would like your help! We are expecting around 70 people.

My plan was: 7 vodka bottles (700ml) 3 tequila bottles (700ml) 2 gin bottles (700ml)

2 beer cases (48 bottles total, 330ml each bottle)

So in total we’re talking about 8.5 liters of hard liquor and 33.5 liters of beer (We’ll also have soft drinks and mixers).

I don’t know if this is the right place to ask this but any help would be welcomed!

Thanks!!!

Edit: average age is around 20.

From your feedback – We’re probably going for 1 less bottle of vodka and adding more beer!