6. Acquisitions The Company has acquired numerous companies throughout its history and those acquisitions have generally included significant future contingent consideration. The Company gives no assurance that it will make acquisitions in the future and if they do make acquisitions gives no assurance that such acquisitions will be successful. The Company made the following acquisitions during fiscal 2017: RAF Effective April 16, 2017, the Company acquired the business operations of RAF. RAF has been in business since 1991 as a multi-disciplined engineering and consulting and design company, headquartered on Long Island. The firm has been providing Engineering, Design, Permitting, Inspection and Construction Management services to the utility, industrial, commercial, and property management industries. RAF specializes in turnkey above ground tank inspection, repair and cleaning services, as well as concrete, steel, masonry, and roofing routine maintenance inspection and design. The purchase price for RAF was $133, all of which was allocated to goodwill as follows: 1 ) assumed liabilities of $123; and 2 ) contingent consideration of $10 paid in fiscal 2017. PSR Effective October 1, 2017 the Company acquired all of the stock of PSR. PSR was established in Serbia in 2006 and specializes in the design and engineering associated with high voltage substations, design engineering for electrical equipment in power plants, 3D modeling, commissioning, site supervision and other engineering services for clients in Europe, North America, South America and the Middle East. At the time of acquisition, PSR had a highly trained staff of approximately 30 engineers. PSR has acted as a subcontractor to the Company for over three years. The total purchase price of $3,248 included cash at closing of $1,000, estimated contingent consideration of $1,763 and $485 due to seller upon realization of net working capital recorded at closing. As part of the working capital recorded at closing, the Company received cash of $237. The Company allocated $58 to fixed assets and the balance to goodwill. Future Contingent Payments As of September 29, 2018, the Company had three active acquisition agreements whereby additional contingent consideration may be earned by the former shareholders: 1 ) effective July 1, 2012 the Company acquired certain assets of BGA, LLC (BGA); 2 ) effective July 5, 2015, the Company acquired certain assets of Substation Design Services, LLC (SDS); and 3 ) effective October 1, 2017, the Company acquired all of the stock of PSR Engineering Solutions d.o.o. Beograd (Vozdovac) (PSR). The Company estimates future contingent payments at September 29, 2018 as follows: Fiscal Years Ending Total December 29, 2018 (after September 29, 2018) $ 553 December 28, 2019 450 January 2, 2021 730 Estimated future contingent consideration payments $ 1,733 Estimates of future contingent payments are subject to significant judgment and actual payments may materially differ from estimates. Potential future contingent payments to be made to all active acquisitions are capped at cumulative maximum of $2.4 million. The Company estimates future contingent consideration in payments based on forecasted performance and recorded at the net present value of those expected payments as of September 29, 2018. The measurement is based on significant inputs that are not observable in the market, which Fair Value Measurements and Disclosures (ASU Topic 820 - 10 - 35 ) refers to as Level 3 inputs. There has been no change in the fair value of contingent consideration for the thirty-nine week period ended September 29, 2018. The Company paid contingent consideration of $0.3 million and $0.8 million during the thirty-nine week periods ended September 29, 2018 and September 30, 2017, respectively.