An analytical balance like that of Fig. 10.2 is used to weigh a 15-oz (troy) quantity of platinum in air at 1 atm and 20?C. The density of platinum is 21,380 kg/m3 and that of the standard brass weights is 8490 kg/m3. If the price of platinum is $400 per oz, calculate the dollar value of the buoyancy error in weight determination. (Note: 1 lbm = 12 troy oz.)