>I have a calculated column in a grid that multiplies the cost times the quantity. The calculated column displays 6 zeros to the right of the decimal. When I set the sparse property to .F. the data in the column disapears. Masks, and alignment properties seem to make no difference. What am I doing wrong?

It should be enough (assuming that you use right expression for Column.CotrolSource):
Column.Text.Inputmask="99999.99"
Column.Sparse=.F.