Putting it to good use

The calculations concerning the present and future value of money are valuable aids to financial decision-making. The following examples illustrate their practical application. Note that in all the examples, the interest rate is expressed as a proportion (e.g. 5% is entered as 0.05) and it is assumed that interest is compounded once a year. The sample spreadsheet for this chapter shows the formulas in use and includes some more complex examples.

Sinking funds

A situation might arise where you want to set aside a lump sum to replace a machine in five years’ time (although this might not be the best use of a cash surplus – see Chapter 19). For example, suppose you know that you will need to spend $50,000 in five years’ time, ...

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