Make the auto-sum of values of the selected columns.
Optional: presence in property of a plug-in grants the right to select from a column "checkboxes", what appropriate units in the "numerical" column enters into the auto-sum and what are not present (costs the tick - enters, it is not necessary - does not enter).
MultipillerGridPlugin
Includes calculation of multipliers in the dropping out list for SummaryGridPlugin, does not work without it.
Checkboxes parameters:
Displays checkboxes or graphic ticks if no EditableGridPlugin.
Selectors parameters
Displays standard selectors or sets it graphic registration in special dropdown.css file.