Intuit inc. develops and sells software products for the personal finance market, including popular titles such as quickbooks® and turbotax®. classify each of the following costs and expenses for this company as either variable or fixed to the number of units produced and sold: a. packaging costsb. sales commissionsc. property taxes on general officesd. shipping expensese. straight-line depreciation of computer equipmentf. president’s salaryg. salaries of software developersh. salaries of human resources personneli. wages of telephone order assistantsj. cdsk. users' guides