Please assist with the given problem.
Intuit Inc. develops and sells software products for the personal finance market, including popular titles such as Quicken and TurboTax. Classify each of the following cost an expenses for this company as either variable or fixed to number of units produced and sold:
a. Salaries of software developers
b. Salaries for customers support personnel
c. CDS
d. Sales commissions
e. Advertising
f. Straight-line depreciation of computer equipment
g. Shipping expenses
h. Packaging expenses