Terms on unit economics.

The average total sales and marketing cost to acquire one new paying customer.

The percentage of customers or revenue you lose over a period, the leak in your growth bucket.

The percentage of revenue left after the direct costs of delivering your product or service, a core measure of business quality.

The total gross profit you expect to earn from a customer over the entire time they stay with you.

Monthly and annual recurring revenue: the predictable subscription income a business earns each month or year.