in the standard edition of dhmtlGrid, we can't use an

 in the standard edition of
dhmtlGrid, we can’t use any formulas?

the formulas only in profesonal editon? if
I only want to get a column sum in the footer, what can I do?

if a cell’s value
change, how does the summary cell know?

The math cell is
compatible with standard edition as well, but it available only as part of pro

The “sum”
functionality available only for branches in TreeGrid,  “sum”

grid planed to be implemented in oncoming version ( release planed on middle of
November) The related cell value will automatically updated after changes of
any linked cell.