Unfortunately there is no way to have two rows for total and that is why we used the concept of Dimensionality to get you the result you were looking for.
If you have two products and always displays two products then sunindia solution works fine, what if you have 100 Products? It is not feasible to write this 100 times, instead create a new chart with Product as dimension and use the expression you used in the chart. This is the best solution.
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