Contribution margin is calculated by

a. Fixed expenses-controllable profits

b. Fixed expenses-direct profit

c. Revenue-cost of goods sold-variable expenses

d. Revenue--variable expenses-fixed expenses

Company A purchased goods from a company in Britain.The dollar per unit of foreign currency has increased from the time the good were purchased and delivered until the payment date 30 days later.The payment is required to be made in British Pounds. This would cause

a. A decrease in the amount owed

b. An increase in the amount owed

c. No difference since the rates do not vary on British Pounds

d. No difference since US dollars remain at a constant rate