The neutral wire color is white in USA, Canada and other countries which run a 60 Hz electrical power service. The neutral wire color is blue in countries in Europe and eâ¦lsewhere which run a 50 Hz electrical power service.
Melpomenem/iStock/Getty Images. The Holding Period Return is an investment measure that calculates the return you have received on your investment over the length of time that you have held the investment.
Calculating the Average Collection Period. The standard formula for calculating average collection period is the number of working days divided by the debtor receivables turnover ratio. For an annual average collection period, the number of working days is set to 365.