Answer: BruceCo would have to sell 220 backpacks
Explanation: The projection of a $10,000 profit can be calculated properly by the equation;
Revenue - Cost = Profit
There is a one-time set up charge of 1000 and this is a fixed cost (as it does not change regardless of how many units they eventually sell). Also they would be spending $30 to buy each unit and still spend $20 to customize each. So each unit would cost $50 to acquire. If they plan on selling each unit at the rate of $100, then the total revenue would be 100 times X (where X is the number of units sold). Therefore the profit can be better projected by the equation;
Revenue - Cost = Profit
100X - (50X + 1000) = 10000
100X -50X - 1000 = 10000
50X = 10000 + 1000
50X = 11000
Divide both sides of the equation by 50
X = 220
Therefore, BruceCo must sell 220 units (at least) in order to meet a $10,000 profit projection