EasySpreadsheet allows you to easily find the sum of values in cells that are not in the same column or row.
To add a selection of cells:
Select the cells you wish to add. To select different cells:
Click one cell that you want in your total.
Hold down the Ctrl key while you click the other cells (or cell groups) that you want in your total.
As you select cells, the sum of your selected cells will appear in the status bar at the bottom of your screen (Sum=xxx).
You can place the sum in the status bar into a cell in your sheet. Go to the Data menu, and click Add Different Cells. Or, if you are in Easy Mode, click the Add Different Cells button (in Advanced Mode, click the smaller icon shown below).
Click the cell that you want the sum to be inserted into.
The sum of the selected cells will appear in the cell you clicked. (Actually, a formula including the SUM function will be inserted into the cell.) Note that this sum is a value, and thus, can be used in calculations.