A 40 X 50 X 9′ deep extends 4′ each way beyond the building lines, sides are vertical, disregard any expansion. How many cubic yards of soil will come from this excavation ?

A 40 X 50 X 9′ deep extends 4′ each way beyond the building lines, sides are vertical, disregard any expansion. How many cubic yards of soil will come from this excavation ?