Handicap Calculation for John King for Week 19

Week of Rounds Used:		19	18	17	16	15		Total		Average		90%		Rounded to:
Gross Score:		40	42	42	44	43		211		42.20
Hdcp Score (over Par):		5	7	7	9	8		36		7.20		6.48		6

What does this mean? How are handicaps calculated?
Handicap Projection for John King for Week 20

If your next round score is:		Your new Handicap will be:
27-31		4
32-37		5
38-43		6
44-48		7
49-54		8