Handicap Calculation for Mark Eaton for Week 19

Week of Rounds Used:		15	14	13	12	11		Total		Average		90%		Rounded to:
Gross Score:		54	52	48	50	48		252		50.40
Hdcp Score (over Par):		18	15	13	15	13		74		14.80		13.32		13

What does this mean? How are handicaps calculated?
Handicap Projection for Mark Eaton for Week 20

If your next round score is:		Your new Handicap will be:
33-37		11
38-43		12
44-48		13
49-54		14
55-60		15