How to Use Excel to Calculate the ROI on a Product. "Return on investment" is a financial calculation used to gauge how well the money you invest earns you even more money.

When it comes to calculating interest rates for investments and bonds, the Yield and IRR formulas in Excel can quickly become your friends.

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Using Excel to calculate IRR with unequal timing of cash flows In the chart below, we have management's estimation for the initial cost and cash flow returns for both the expansion and new ...