A new highway is to be constructed. Design A calls for a concrete pavement costing $85 per foot with a 16-year life; three paved ditches costing $5 per foot each; and two box culverts every mile, each costing $9,000 and having a 16-year life. Annual maintenance will cost $1,800 per mile; the culverts must be cleaned every four years at a cost of $350 each per mile. Design B calls for a bituminous pavement costing $40 per foot with a 8-year life; three sodded ditches costing $1.60 per foot each; and two pipe culverts every mile, each costing $2,150 and having a 8-year life. The replacement culverts will cost $2,500 each. Annual maintenance will cost $2,600 per mile; the culverts must be cleaned yearly at a cost of $225 each per mile; and the annual ditch maintenance will cost $1.30 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 $ /mi. (Round to the nearest hundreds.)