You are analyzing historic unit costs for 18" Class 5 reinforced concrete pipe in a database. The unit costs 25 of 120. The following question requires your selection of Scenario 1.2.108 from the right side of your split screen, using the drop down menu, to reference during your response/choice of responses. Calculate the mean unit cost. include all costs - material, labor, equipment, and other, for the excavation, bedding, pipe and backfill. Refer to the following table: BID DATE LOCATION ESTIMATED QUANTITY UNIT COST 3/11/03 Cincinnati, OH, USA 147 $55.00 9/14/05 Eau Clair, WI, USA 143 $34.50 8/17/06 Louisville, KY, USA 462 $37.30 8/31/05 Atlanta, GA, USA 530 $55.00 11/19/04 Atlanta, GA, USA 308 $40.00 1/26/05 Atlanta, GA, USA 45 $26.78 2/21/07 Denver, CO, USA 256 $46.59 4/18/06 Colorado Springs, CO, USA 176 $75.00 Colorado Springs, CO, USA 80 4/18/06 $65.00 A.O $48.09 B. $48.35 C. $46.59 D. O $48.22