with such a large amount of concrete needed the cost of sakrete will
eat you alive... really compare the cost of 5 yards truck delievered
and 5 yards of bags. sakrete will likey be 5 times the cost.

you will get a better job and near the same price and a ton less work
by having it done professionally.

because sakrete or buying concrete materials sand cement gravel costs
so much more than delivery by concrete truck