For level 1 training lesson 8's Activity: Add Formulas to Size Margin Report Module. I have a question regards to the summary setting. As the screenshot below indicated, if I don't alter the summary method for line item "Margin %" and leave it as default(sum), it would produce the wired number in the second picture shows.
After changing it summary method to formula, the numbers go back to normal. My question is is it by changing the summary method, it should only be applied to the summary column, not to the individual month's column?
