Sumif or sumproduct formula for a rolling calendar

Hi,

I have sheet 1 where it's a rolling 3 year calendar. Sheet 2 has my data. My goal is to be able to have a formula recreate the numbers I manually summed. I want it to look at the dates, and sum only data is 3 years, or under from the date listed. Once it goes past 3 years, it should no longer be included. My real data set has a lot more data, and goes out more years. This is just a quick example

Thank you