Cost of Revenues and Operating Expenses
Cost of Revenues. Cost of subscription and support revenues primarily consists of expenses related to hosting our service and providing support, the costs of data center capacity, depreciation or operating lease expense associated with computer equipment and software, allocated overhead and amortization expense associated with capitalized software related to our services and acquired developed technologies. We allocate overhead such as information technology infrastructure, rent and occupancy charges based on headcount. Employee benefit costs and taxes are allocated based upon a percentage of total compensation expense. As such, general overhead expenses are reflected in each cost of revenue and operating expense category. Cost of professional services and other revenues consists primarily of employee-related costs associated with these services, including stock-based expenses, the cost of subcontractors and allocated overhead. The cost of providing professional services is significantly higher as a percentage of the related revenue than for our enterprise cloud computing subscription service due to the direct labor costs and costs of subcontractors. 36
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We intend to continue to invest additional resources in our enterprise cloud computing services. For example, we have invested in additional database software and we plan to open additional data centers and expand our current data centers in the future. Additionally, as we acquire new businesses and technologies, the amortization expense associated with this activity will be included in cost of revenues. The timing of these additional expenses will affect our cost of revenues, both in terms of absolute dollars and as a percentage of revenues, in the affected periods. Research and Development. Research and development expenses consist primarily of salaries and related expenses, including stock-based expenses, the costs of our development and test data center and allocated overhead. We continue to focus our research and development efforts on adding new features and services, integrating acquired technologies, increasing the functionality and security and enhancing the ease of use of our enterprise cloud computing services. Our proprietary, scalable and secure multi-tenant architecture enables us to provide all of our customers with a service based on a single version of our application. As a result, we do not have to maintain multiple versions, which enables us to have relatively lower research and development expenses as compared to traditional enterprise software companies. We expect that in the future, research and development expenses will increase in absolute dollars and may increase as a percentage of total revenues as we invest in building the necessary employee and system infrastructure required to support the development of new, and improve existing, technologies and the integration of acquired businesses and technologies. Marketing and Sales. Marketing and sales expenses are our largest cost and consist primarily of salaries and related expenses, including stock-based expenses, for our sales and marketing staff, including commissions, payments to partners, marketing programs and allocated overhead. Marketing programs consist of advertising, events, corporate communications, brand building and product marketing activities.