A gold mining firm is concerned about short-term volatility in its revenues. Gold currently sells for $1,600 an ounce, but the price is extremely volatile and could fall as low as $1,520 or rise as high as $1,680 in the next month. The company will bring 1,000 ounces of gold to the market next month.

a. What will be the total revenues if the firm remains unhedged for gold prices of (i) $1,520, (ii) $1,600, and (iii) $1,680 an ounce?

b. The futures price of gold for delivery 1 month ahead is $1,620. What will be the firm's total revenues if the firm enters into a 1-month futures contract to deliver 1,000 ounces of gold?

c. What will be the total revenues if the firm buys a 1-month put option to sell gold for $1,000 an ounce? The put option costs $110 per ounce.