by “Purchases of property and equipment, including internal-use software and website development, net” which is included in cash flow from investing activities. 

Free Cash Flow Less Lease Principal Repayments 

Free cash flow less lease principal repayments is free cash flow reduced by “Principal repayments of capital lease obligations,” and “Principal repayments of finance lease obligations,” which are included in cash flow from financing activities. 

Free Cash Flow Less Finance Lease Principal Repayments and Assets Acquired Under Capital Leases 

Free cash flow less finance lease principal repayments and assets acquired under capital leases is free cash flow reduced by “Principal repayments of finance lease obligations,” which are included in cash flow from financing activities, and property and equipment acquired under capital leases. In this measure, property and equipment acquired under capital leases is reflected as if these assets had been purchased with cash, which is not the case as these assets have been leased. 

All of these free cash flows measures have limitations as they omit certain components of the overall cash flow statementcash flow available for discretionary expenditures. For example, these measures of free cash flows do not incorporate the portion of payments representing principal reductions of debt or cash payments for business acquisitions. Additionally, our mix of property and equipment acquisitions with cash or other financing options may change over time. Therefore, we believe it is important to view free cash flows measures only as a complement to our entire consolidated statements of cash flows. 

Operating Expenses, Excluding Stock-Based Compensation 

Operating expenses with and without stock-based compensation is provided to show the impact of stock-based compensation, which is non-cash and excluded from our internal operating plans and measurement of financial performance (although we consider the dilutive impact to our shareholders when awarding stock-based compensation and value such awards accordingly). In addition, unlike other centrally-incurred operating costs, stock-based compensation is not allocated to segment 

results, and therefore, excluding it from operating expenses is consistent with our segment presentation in our footnotes to the consolidated financial statements. 

Operating expenses without stock-based compensation has limitations since it does not include all expenses primarily related to our workforce. More specifically, if we did not pay out a portion of our compensation in the form of stock-based compensation, our cash salary expense included in the “Fulfillment,” “Marketing,” “Technology and content,” and “General and administrative” line items would be higher. 

Effect of Foreign Exchange Rates 

Information regarding the effect of foreign exchange rates, versus the U.S. Dollar, on our consolidated statements of operations is provided to show reported period operating results had the foreign exchange rates remained the same as those in effect in the comparable prior year period. 

Guidance 

We provided guidance on January 28, 2016 , in our earnings release furnished on Form 8-K