Financial Overview
In 2007, we grew revenue, expanded earnings and generated strong operating cash flow. Our investments in the growing areas of digital production and office systems, particularly with respect to color products, contributed to the majority of our equipment sales being generated from products launched in the last two years. During 2007 we completed the acquisitions of Global Imaging Systems, Inc. (GIS) and Advectis, Inc. The acquisition of GIS greatly expanded our reach in the small to mid-size business (SMB) market and together with favorable currency was a key driver of our increase in revenue. Total revenue increased 8% over the prior year reflecting 9% growth in post sale, financing and other revenue and 7% equipment sales growth. Total color revenue was up 14% over the prior year reflecting our investments in this market and document management services (also referred to as Xerox Global Services) post sale, financing and other revenue of $3.4 billion increased 8% over 2006.
2007 gross margins of 40.3% were slightly below prior year as cost improvements were offset by product mix and pricing. Selling, administrative and general (SAG) expense as a percent of revenue was 0.2-percentage points lower year over year. SAG expenses grew as the inclusion of GIS and unfavorable currency offset the benefits of prior restructuring. Additionally, we continued to invest in research and development and to prioritize our investments to the faster growing areas of the market.
Our balance sheet strategy focused on optimizing operating cash flows and returning value to shareholders through acquisitions, share repurchase and dividends. We continue to maintain debt levels primarily to support our customer financing operations as debt associated with our acquisition of GIS was effectively repaid by year-end. We also continued our strategy to replace debt secured by our finance receivables with new unsecured debt, reducing the percentage of secured debt to total debt to a modest 4%. The successful implementation of this strategy enabled us to significantly strengthen our balance sheet and led to our third investment grade credit rating, thereby completing the transition to a high-grade credit.
We finished the year with a cash and cash equivalents balance of $1.1 billion. Our prospective balance sheet strategy includes: optimizing operating cash flows, maintaining our investment grade credit ratings, achieving an optimal cost of capital and effectively deploying cash to deliver and maximize long-term shareholder value. Our strategy also includes maintaining an appropriate leverage of our financing assets (finance receivables and equipment on operating leases) and an appropriate level of non-financing debt.
During 2007 we declared our first quarterly dividend in six years. A dividend of 4.25 cents per share was paid on January 31, 2008 to shareholders of record on December 31, 2007. The dividend declaration underscores our confidence in our business model and the health of our business, which is the foundation for our strong financial position.