The formula for Return on Investment is calculated as:
A = operations costs for a new or enhanced system for the time period
B = one-time cost of acquisition and implementation
C = value if gains from productivity improvements for the time period
Return on Investment = A / (B + C)
Return on Investment = (A + C) / B
Return on Investment = (A + B) / C
Return on Investment = C / (A + B)
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