Estimate the total cost for excavating 26,997 ft of trench in firm clay for an underground cable. The trench will be 9 in. wide and the average depth will be 66 in. A rubber-tire-trenching machine with 85 hp will be used. The cable will be installed in open terrain so there will be no major obstructions to retard the progress of the machine. Assume a 50 min hour to account for normally expected delays. The trenching machine cost $32.5/hour, machine operator Page 2 of 4 $21.67/hour, utility truck cost $7.5/hour, laborer $15.56/hour, foreman $25/hour, and the cost of transporting the equipment to job site is $600.