Jack paid $ 23000 for the ring.
Solution:
Given that, Jack Matthew bought a new diamond ring for $20,000
Sales tax is 5% with a 10% excise tax
To find: total price including taxes
Given that sales tax is 5% of 20,000

Also given that excise tax is 10%

Total price = cost price + sales tax + excise tax
Total price = 20,000 + 1000 + 2000
Total price = 23000
Hence, jack paid $ 23000 for the ring.