When you need to buy more capacity, how much do you typically need to buy?

Question options:

1)[(Current forecast * Market Growth Rate) - (Projected Capacity * 1.8)] / 1.8

2)[(Current forecast * Market Growth Rate) - (Current Capacity * 1.8)] / 1.8

3)[(Current Demand * Market Growth Rate) - (Current Capacity * 1.8)] / 1.8

4)Buy capacity in 100 unit increments to ensure utilization does not exceed 180%

5)[(Current Demand * Market Growth Rate) - (Current Capacity * 1.6)] / 1.6