Indeed, for some gems, such as diamonds, the price per carat can increase exponentially as the gem size increases. Therefore, a 1 carat stone may cost $1,000 while a 2 carat stone may cost $4,000. This means that good quality sapphires and rubies in larger sizes tend to have a much higher price per carat.
Re: Convert positive # to negative. Hi, if you positive number is in A1, use the following formula to convert it to a negative number =A1*-1 Time values can not be negative. Microsoft MVP http://www.teylyn.com Twitter: http://twitter.com/IngeborgNZ. Microsoft MVP.
Excel will not show these negative balances properly. My spreadsheet is set up as follows: Answer: Unfortunately, Excel will not let you express a formatted time value as a negative number. However, you can express your Balance column (ie: column J above) as the number of minutes instead of a time value. Let's look at an example. Download Excel spreadsheet (as demonstrated below) Now to calculate the Balance column (ie: column J) to calculate the balance in minutes, we've used the following formula: