What is an easy way to calculate YTD sales for last year for the same months that have sales this year? In the example below, I want a formula that will determine that we are 4 months into this year, and only add the first 4 months of last year so that we have a YTD comparison. In this example, the 272 is what I am looking for but I don't want to have to update the formula each month. Any help is appreciated!
|Last Year||This Year|