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.
To enter a negative number, use the negation key, , the grey key located to the left of the key. To subtract two numbers, use the black minus key located above the addition key. For example, to subtract -5 from 17, compute 17 - (-5). Press. To enter the function y1 = -x, use the negation key, not the minus sign.