Our transformation towards an industrial based company is ongoing. The one-year contract, as amended, provided for payments of up to $945 million. Summary of Significant Accounting Policies—Accounts Receivable and Note 20. Our pressure pumping services include high-pressure hydraulic fracturing services. For additional information regarding Gulfport\'s action, see Note 20. We also buy processed sand from suppliers on the spot market and resell that sand. Of these drilling rigs, seven are electric rigs and five are mechanical rigs. Additionally, we provide water transfer services in the northeast region. We provided coil tubing services in Eagle Ford Shale and Permian Basin. As of December 31, 2020, we had seven fluid pumping units. Our operational division heads have long-term relationships with our largest customers. This registration requires an acceptable operating record. This trend, however, may not continue in the future. Further, our work for PREPA ended on March 31, 2019. Our recovery on our claims will be subject to factors outside of our control. We may experience losses in excess of our recorded reserves for receivables. On October 14, 2020, the court dismissed the RICO claims. Further, there are a limited number of suppliers that manufacture the equipment we use. We also provide logistics solutions to deliver our frac sand products to our customers. In addition, we bear the risk of non-delivery under our contracts. Any such unionization could increase our costs or limit our flexibility. We may not be able to obtain any such alternative source of capital. The cost of managing such risks may be significant. Business—Regulations" above. Any such consequence could have a material adverse effect on our business.