For Shoaff Park, your handicap is 80% of the difference between the average
of your last ten rounds and 45:
0.8 * (Last_Ten_Average - 45)
Swinney Park has a different system, but I haven't played enough rounds there to get a handicap there (although the course is much easier and I've shot under par twice!).
What handicap system do you use? Let me know!