Sorry for the confusion, but both tables use Input Controls and thus the data most likely will be filtered based on the users selections. The tables use different input controls and can't be combined for this particular report. That is why I specifically need each Tables calculated amount after Input Control selection and then add together to for a Grand Total.
I may be able to accomplish this by adding a separate query and have one table block for each query and utilize merged dimensions for the Grand Total but I would like to avoid this because of performance.