Question: Ether is used in the process of extracting cod-liver oil from livers. Livers enter the extractor at a rate of 1 500 lbm/h and consist of 32% oil and 68% inert material. The solvent is introduced to the extractor at a rate of 3100 lbm/h and consists of 2.80% oil and 97.2% ether. The cod-liver oil extract leaves the process at a rate of 2600 lbm/h and consists of 21 % oil and 79% ether. Calculate the flow rate and composition of the leaving processed livers.