Yellowknife Mining sold 34,300 oz of gold in Year 1 at an average price of $1160 per

Question:

Yellowknife Mining sold 34,300 oz of gold in Year 1 at an average price of $1160 per ounce. Production was down to 23,750 oz in Year 2 because of a strike by the miners, but the average price obtained was $1280 per ounce. What was the percent change from Year 1 to Year 2 in:
a. The amount of gold produced?
b. The average selling price per ounce?
c. The revenue from the sale of gold?