A compound A will be converted into B in a stirred tank reactor. The product B and unreact...

A compound A will be converted into B in a stirred tank reactor. The product B and unreacted A are purified in a separation unit. Unreacted A is recycled to the reactor. A process engineer has found that the initial cost of the system is a function of the conversion x_A. Find the conversion that will result in the lowest cost system. C is a proportionality constant.