If your goal is to make a million dollars a year with a certain product or service, the number of units of that service or product that you can provide (e.g. you have time to take on only so many projects a year, you're hand-building furniture and can make so many a week, etc.) or the expected number of sales you can make tells you how much you would need to charge to reach your goal. price = $1,000,000/# units
But it really depends on what end of the stick you're looking at. The OP's objective is to reach a certain revenue. You can look from the other side and say "I'll be selling my product at that price, which means I'll make price*units per year."