It is possible to use a Data Table to show the effect of changing two model inputs at the same time. To do so, one creates a table structure with the list of values for one variable in a row, and the other in a column. Also, the cell reference to the output must be placed in the top-left corner of the table.
For example, one could create the table so that the possible values of Price are shown in a column and the values for Volume are along the top row, with the cell reference to the profit in the top-left. The following image shows the formula view of this (using the Formulas/Show Formulas):