1-4. Using a spreadsheet you have written, by trial and error determine the construction cost of Alternative B in Table 1-5 that will make its total annual cost equal to the total annual cost of Alternative A. With the significant figures given, the costs may be assumed to be "equal" when they are within $1,000 of each other. Note: the interest during construction and inflation prior to construction used in Table 1-5 was 3.00%. TABLE 1-5 Comparison of design alternatives by equivalent costs I Equivalent Costs Cost Items Alternative A Alternative B Capital costs Construction cost Engineering $6,300,000 $5,300,000 Land 945,000 795,000 Legal, fiscal, administrative 130,000 200,000 50,000 Interest during construction 80,000 189.000 Subtotal 159.000 $7,614,000 $6,534,000 Inflation prior to construction 228.000 196,000 Total capital costs $7,842.000 $6,730,000 Annualized capital cost 557,000 478,000 Operating and maintenance costs Personnel 220,000 290,000 Power 120,000 60,000 Chemicals 15,000 128.000 Miscellaneous utilities 30.000 30,000 Miscellaneous supplies and materials 50,000 50,000 Annual operating and maintenance costs $ 435.000 S558,000 Total annual costs" S992.0 S1,036,000 "Adapted from Water Pollution Control Federation, MOP & Wastewater Treatment Plan Design Washington DC, 1977 "Cost basis - 2006. Engineering News Record Construction Cost Index - 7600.72 Also called "debt service." Capital cost recovery factor (AP, 55, 25) 00710 Annualized capital cost + annual operating and maintenance costs