ABC International has invested $1 million in the assets assigned to its Idaho subsidiary. As an investment center, the facility is judged based on its return on invested funds. The subsidiary must meet an annual return on investment target of 12%. In its most recent accounting period, Idaho has generated net income of $180,000. The return can be measured in two ways:

Residual income is calculated as net income less a charge for the cost of capital. The charge is known as the equity charge and is calculated as the value of equity capital multiplied by the cost of equity or the required rate of return on equity. Given the opportunity cost of equity, a company can have positive net income but negative residual income.

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