Handicap Calculation for Mike Manning for Week 19

Week of Rounds Used:		9	7	7	6	0		Total		Average		90%		Rounded to:
Gross Score:		57	59	63	57	52		288		57.60
Hdcp Score (over Par):		19	22	26	21	15		103		20.60		18.54		19

What does this mean? How are handicaps calculated?
Handicap Projection for Mike Manning for Week 20

If your next round score is:		Your new Handicap will be:
39-44		17
45-49		18
50-55		19
56-60		20
61-66		21