2021 and 2020, respectively. Capital expenditures in each period were primarily related to investment in buildings, property and equipment to support development and production of new and expanded product lines and to facilitate growth in our distribution markets. Historically, we have incurred significant expenses in connection with facility construction, production automation, product development and the introduction of new products. We anticipate that we will spend approximately $45 to $50 million in 2021 for buildings, property and equipment.
Cash flows used in financing activities. Cash used in financing activities for the three-month periods ended March 31, 2021 and 2020 was approximately $26.2 million and $6.2 million, respectively. In the first quarter of 2021, we decreased our net borrowings by approximately $30.9 million by paying down our debt. In the first quarter of 2020, we increased our net borrowings by approximately $6.1 million to partially finance the payment of contingent consideration of $12.8 million, which is classified as a financing activity, principally related to our acquisition of Cianna Medical.
As of March 31, 2021, we had outstanding borrowings of approximately $321 million under the Third Amended Credit Agreement, with additional available borrowings of approximately $418 million, based on the maximum net leverage ratio and the aggregate revolving credit commitment pursuant to the Third Amended Credit Agreement. Our interest rate as of March 31, 2021 was a fixed rate of 2.12% on $175 million as a result of an interest rate swap (see Note 9 to our Condensed Notes to Consolidated Financial Statements set forth in Part I, Item 1 of this report) and a variable floating rate of 1.11% on $145.8 million. Our interest rate as of December 31, 2020 was a fixed rate of 2.37% on $175 million as a result of an interest rate swap and a variable floating rate of 1.40% on $176.6 million. The foregoing fixed rates are exclusive of changes in the notional amount and fixed rate associated with our interest rate swaps beginning July 6, 2021 as described in Note 9 to our Condensed Notes to Consolidated Financial Statements set forth in Part I, Item 1 of this report and potential future changes in the applicable margin.
We currently believe that our existing cash balances, anticipated future cash flows from operations and borrowings under the Third Amended Credit Agreement will be adequate to fund our current and currently planned future operations for the next twelve months and the foreseeable future.
Off-Balance Sheet Arrangements
We have committed to provide loans of up to an additional €2 million at the discretion of Selio Medical Limited at a rate of 5% per annum until one year and 45 days have passed from the date Selio receives FDA Section 510(k) approval of a medical device it is currently developing. The current note receivable balance from Selio is $250,000. If exercised, these loans would be securitized by all the present and future assets and property of the borrower. Aside from this arrangement, we do not have any off-balance sheet arrangements that have had, or are reasonably likely in the future to have, an effect on our financial condition, results of operations, liquidity, capital expenditures or capital resources.
CRITICAL ACCOUNTING POLICIES AND ESTIMATES
Our financial results are affected by the selection and application of accounting policies and methods. In the three months ended March 31, 2021, there were no changes to the application of critical accounting policies previously disclosed in Part II, Item 7 of the 2020 Annual Report on Form 10-K. In the event we pursue and complete significant transactions or acquisitions in the future, additional funds will likely be required to meet our strategic needs, which may require us to raise additional funds in the debt or equity markets.
CAUTIONARY NOTICE REGARDING FORWARD-LOOKING STATEMENTS
This report includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements in this report, other than statements of historical fact, are “forward-looking statements” for purposes of these provisions, including, without limitation, any projections of earnings, revenues or other financial items, any statements of the plans and objectives of our management for future operations, any statements concerning proposed new products or services, any statements regarding the integration, development or commercialization of the business or any assets acquired from other parties, any statements regarding future economic conditions or performance, and any statements of assumptions