Assist the directors of Springs Ltd in determining whether investing

in supplements is the correct decision. Assume that the investment

will be made this year and that the manufacturing of the supplements

will commence next year.

Include in our calculations and decision the following:

$1.$ Accounting Rate of Return $($ARR$)$

$2.$ Net present value $($NPV$)$

$3.$ Internal Rate of Return $($IRR$)$

$4.$ Profitability Index