Find any transactions totaling $10,000+ within 24 hour period for the same customer

I have a large amount of data I need to sift through and am having trouble figuring out how to automate this process a bit. My store does many large transactions, often times with the same customers. We need to find any transactions throughout the year totaling $10,000+ within a 24 hour period for the same customer. I.e. If "Customer A" comes in and makes a $6,000 purchase, then comes back within 24 hours and makes a second transaction in the amount of $4,000+, we need to know this.

I have shrunk down the data and randomized any personal info of our customer but kept the basic format of the sale report I need to look through. How can I do this without my head exploding?