Ashlyn is a physician (not covered by a retirement plan) with a salary of $140,000 from the medical clinic where she works. She supports her husband, Ethan, who stays home with their two children and has no earned income. Both are in their thirties, and they have no other sources of income. 

What is the maximum amount that Ashlyn and Ethan combined may contribute to their traditional IRAs and deduct for the 2022 tax year?