im bidding on a job of 965 sqft of walkway and patio.im using the cambridge roundtable collection. i figure 41 tons of 3/4 and 9 tons of dust(just the high price material) and the block. i get the pavers @ 2.20 sq ft. the pavers are 4 different sizes and hes getting a border. i was thinking of charging 16.00 sqft. is that 2 high???