value of production

Yesterday's ann said they were expecting to produce 35,000 tonnes of copper. Copper spot is US4.24/lb. There are 2,205 lbs/metric tonne, so that is 80 mil lbs, ergo the copper should be worth US$320 mil and the silver US$30 mil.

Have I missed any zeros?

This is from a Rio site:

Conversion of weights and measures

1 troy ounce = 31.1 grams
1 kilogram = 32.15 troy ounces
1 kilogram = 2.2046 pounds
1 metric tonne = 1,000 kilograms
1 metric tonne = 2,204.6 pounds
1 metric tonne = 1.1023 short tons
1 short ton = 2,000 pounds
1 long ton = 2,240 pounds
1 gram per metric tonne = 0.02917 troy ounces per short ton
1 gram per metric tonne = 0.03215 troy ounces per metric tonne
1 kilometre = 0.6214 miles