The Ohio Inn is a small bed-and-breakfast located in Southern Ohio. Their rate is $50 per person for one nights lodging. This price includes a complimentary continental breakfast. The owners of the Inn estimate that their variable expense per person is $20. This cost includes expenses such as food, maid service, and utilities. The inns fixed expenses total $42,000 per year. The inn can accommodate 10 guests each night.

Given the facts above, calculate the following:

a). Contribution Margin per guest

b). Contribution Margin Ratio

c). Annual Break-even point in units and in dollars

d). The number of guests required to earn a target net profit of $60,000 for the year (Note: Ignore income taxes).