Ed. list a wide range of wholesale prices for faceted gem rubies. Prices are dependent on origin, color, size, and clarity: from a low of $100 to $15,000/ ct maximum. Burmese stones in 1/2 to 1 ct sizes with slightly purplish red color and light inclusions range from $300 to $3000/ ct, for example.
The Microsoft Excel ISNA function can be used to check for a #N/A (value not available) error. The ISNA function is a built-in function in Excel that is categorized as an Information Function. It can be used as a worksheet function (WS) in Excel. As a worksheet function, the ISNA function can be entered as part of a formula in a cell of a worksheet. The syntax for the ISNA function in Microsoft Excel is:
In this function, the Width is assumed to be in cell A1. The problem here is that Excel doesn't know that this function depends on cell A1 and therefore will not recalculate the formula when A1 is changed. Thus, the cell calling the function call will not contain the correct result when cell A1 is changed.