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.
Row 11 shows the change from the prior month. Each formula in Row 11 is the result of subtraction using the â-â (hyphen) as a minus sign. To create the formula in cell D11: 1  Click on cell D11. 2  Click in the formula bar. 3  Type â=â to tell Excel that you are beginning a formula. 4  Type âD9-C9â.  Press Enter.