Handicap Calculation for Rob Simpson for Week 19

Week of Rounds Used:		4	3	2	10	5		Total		Average		90%		Rounded to:
Gross Score:		54	47	57	57	52		267		53.40
Hdcp Score (over Par):		18	12	20	19	16		85		17.00		15.30		15

What does this mean? How are handicaps calculated?
Handicap Projection for Rob Simpson for Week 20

If your next round score is:		Your new Handicap will be:
36-40		13
41-46		14
47-52		15
53-57		16
58-63		17