A 120m by 120m lot is to be divided into 9 equal square sections. The elevations of the ground surface at each corner of the square section are as follows:   A=6.8m E=6.9m I=7.5m M=8.9m B=8.2m F=8.5m J=6.9m N=7.7m C=7.1m G=7.5m K=8.4m O=6.7m D=6.7m H=8.8m L=6.7m P=7.9m   Find the volume to be excavated if the ground surface is to be leveled to elevation 4.3m.   Round your answer to 3 decimal places.

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