A slab measures 160 x 45. The slab is 6″ thick with a thickened edge that is 6″ wide and 24″ deep. How many cubic yards of concrete are required?

A slab measures 160 x 45. The slab is 6″ thick with a thickened edge that is 6″ wide and 24″ deep. How many cubic yards of concrete are required?