Effective December 5, 2013, we entered into an Amended and Restated Credit Agreement with a commitment for a $125.0 million revolving credit facility with a maturity date of November 30, 2018. This agreement was amended in August 2015 and January 2016 (hereafter referred to as “Amended Credit Agreement”). The Amended Credit Agreement is unsecured and has loan covenants, including requirements that the Company comply with a consolidated fixed charge coverage ratio and consolidated leverage ratio. Proceeds from the Amended Credit Agreement may be used for working capital, acquisitions, purchases of the Company’s common stock, dividend payments to the Company’s common stockholders, capital expenditures and other corporate purposes. The pricing grid which is based on the Company’s consolidated leverage ratio with the applicable spread over LIBOR ranging from 1.5% to 2.5% or the applicable spread over the Base Rate ranging from 0.1% to 1%. Fees under the Amended Credit Agreement include an unused commitment fee ranging from 0.1% to 0.25% depending on the Company’s consolidated leverage ratio and the amount of funds outstanding under the Amended Credit Agreement. On December 31, 2015, $44.0 million was outstanding under our Amended Credit Agreement resulting in $81.0 million of availability, and we were in compliance with all of the covenants thereunder.
The increase in cash and cash equivalents of $1.5 million from December 31, 2014 to December 31, 2015 was due primarily to $41.2 million provided by operations and $9.5 million net proceeds from our Amended Credit Agreement. The major uses of cash for investing and financing activities included: purchase of businesses ($19.0 million), distributions to non-controlling interests ($9.6 million), payments of cash dividends to our shareholders ($7.4 million), acquisitions of non-controlling interests ($7.1 million), purchases of fixed assets ($6.3 million), and payments on notes payable ($0.9 million).
On December 31, 2015, we acquired a 59% interest in a four-clinic practice for $4.6 million in cash and $400,000 in seller notes that are payable in two principal installments of an aggregate of $200,000 each, plus accrued interest, in December 2016 and 2017. On June 30, 2015, we acquired a 70% interest in a four-clinic physical therapy practice. The purchase price was $3.6 million in cash and $0.7 million in seller notes that are payable plus accrued interest, in June 2018. On April 30, 2015, we acquired a 70% interest in a three-clinic physical therapy practice. The purchase price was $4.7 million in cash and $150,000 in a seller note that is payable in two principal installments of $75,000 each, plus accrued interest, in April 2016 and 2017. On January 31, 2015, we acquired a 60% interest in a nine-clinic physical therapy practice. The purchase price for the 60% interest was $6.7 million in cash and $0.5 million in a seller note that is payable in two principal installments of $250,000 each, plus accrued interest, in January 2016 and 2017. In addition to the multi-clinic acquisitions, on August 31, 2015, we acquired a 60% interest in a single physical therapy clinic for $150,000 in cash and $50,000 in a seller note that is payable plus accrued interest in August 2016.
The purchase price for the 70% interest in the April 2014 Acquisition was $10.6 million in cash and a $400,000 seller note, that is payable in two principal installments totaling $200,000 each, plus accrued interest, in April 2015 and 2016. The purchase price for the August 2014 Acquisition was $1.0 million in cash. In addition, during 2014, we acquired three individual clinic practices for an aggregate of $595,000. The purchase price for the 72% interest in the February 2013 Acquisition was $4.3 million in cash and $400,000 in a seller note, that is payable in two principal installments totaling $200,000 each, plus accrued interest, in February 2014 and 2015, which has been paid in full. The purchase price for the 50% interest in the April 2013 Acquisition was $2.4 million in cash and $200,000 in a seller note, that is payable in two principal installments totaling $100,000 each, plus accrued interest, in April of 2014 and 2015, which has been paid in full. The purchase price for the 80% interest in the May 2013 Acquisition was $3.6 million in cash and $200,000 in a seller note, that is payable in two principal installments totaling $100,000 each, plus accrued interest, in May of 2014 and 2015, which has been paid in full. The purchase price for the 60% interest in the December 9, 2013 Acquisition was $1.7 million in cash. The purchase price for the 90% interest in the December 13, 2013 Acquisition was $35.5 million in cash and $500,000 in a seller note, that is payable in two principal installments totaling $250,000 each, plus accrued interest, in December 2014 and 2015, which has been paid in full. The aggregate purchase price for the three individual clinics acquired in 2013 was $238,000. In four separate transactions during 2014, we purchased interests in two partnerships which were previously classified as redeemable, non-controlling interest. The interests in the partnerships purchased ranged from 10.0% to 35.0%, The aggregate of the purchase prices paid was $4.9 million, which included $3.0 million of net book value. The remaining purchase price of $1.9 million, less future tax benefits of $0.8 million, was recognized as an adjustment to additional paid-in capital. Also, in four separate transactions during 2014, we purchased partnership interests in four partnerships. The interests in the partnerships purchased and sold ranged from less than 1% to 35%. The aggregate of the purchase prices paid