Nova Scotia is a small computer software company which uses the account analysis method and has hired you to perform some management advisory services. The company sold 2,500 high quality payroll programs last year. Cost of goods sold $600,000 Store manager's salary 80,000 Secretary's salary 40,000 Operating costs (Store) 120,000 Sales Personnel 4 employees  Salary $29,000 each Commissions of 15% of sales ? Advertising and promotion per year 20,000 Sales 1,200,000 What is the variable cost per unit sold?