First, find out approximately how many they sell in ONE month, by dividing their 5 month produce, by 5!
950,000,000 / 5 = 190,000,000 approximate monthly doughnuts.
Then, multiply this approximate one month produce by 12 for their yearly produce:
190,000,000 * 12 = 2,280,000,000 doughnuts (2 billion, 280 million).