A new highway is to be constructed. Design A calls for a concrete pavement costing $95 per foot with a 16-year life; three paved ditches costing $3 per foot each; and three box culverts every mile, each costing $10,000 and having a 16-year life. Annual maintenance will cost $1,600 per mile; the culverts must be cleaned every four years at a cost of $550 each per mile Design B calls for a bituminous pavement costing $55 per foot with a 8-year life; four sodded ditches costing $1.30 per foot each; and four pipe culverts every mile, each costing $2,250 and having a 8-year life. The replacement culverts will cost %2,350 each. Annual maintenance will cost $2,800 per mile, the culverts must be cleaned yearly at a cost of $225 each per mile; and the annual ditch maintenance will cost $1.65 per foot per ditch. Compare the two designs on the basis of equivalent worth per mile for a 16-year period. Find the most economical design on the basis of AW and PW if the MARR is 8% per year Click the icon to view the interest and annuity table for discrete compounding when the MARR is 8% per year. The AW value for Design A is Smi. (Round to the nearest hundreds.) The PW value for Design A is s /mi. (Round to the nearest hundreds.) The AW value for Design B is s/mi. (Round to the nearest hundreds.) The PW value for Design B is /mi. (Round to the nearest hundreds.) The most economical design on the basis of AW and PW is Design A