Craig earns the same amount of money each month. His telephone bill is $\frac{1}{20}$ of his monthly earnings, and he pays a total of $$\$720$$ each year for his telephone service. How much does Craig earn each month, in dollars?
Only $0, 1, 2, 3, 4, 5, 6, 7, 8, 9, . , -, $and / are allowed in your answer.
Answers that are mixed numbers must be entered as an improper fraction or
decimal.