Cement conversion........

So at .6 cubic foot per 80 pound bag.........I need 15 bags, right?

I make it 13.875 bags, so allowing for 'spillage' and the possibility tht your mix might be a bit 'light,' I'd buy the fifteen bags.

In fact, being me, I'd probably buy twenty bags, and return any unopened ones after the job - just to be safe...
 
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