Need a formula to prepare SLA report

SLA
Critical = 4 hours
High=8 hours
Medium= 72 hours
Low=120 hours

If the ticket is closed within the SLA then the result should be “Within SLA” else “Exceeding SLA”

Attached is the only data available through the system. I tried to use the status, priority and created date to achieve this but no luck.
Yellow cells indicate data extract from the system.
Appreciate if someone could help me with the available data.