You have received three shipments of iron ores (impure iron sample)of the following weights: 2852, 1578, and 1877 lbs. There is anuncertainty on each weight of ± 5 lb. Analysis of the ores gives 36.28 ±0.04 %, 22.68 ± 0.03 % and 49.23 ± 0.06 % of iron respectively. If you are to pay $ 300per ton (2000 lb) or iron, how much should you pay for the total shipment and what is the uncertainty in the payment?