Handicap Calculation for Bill Holly for Week 19

Week of Rounds Used:		9	8	7	5	3		Total		Average		90%		Rounded to:
Gross Score:		56	54	56	60	50		276		55.20
Hdcp Score (over Par):		20	19	20	22	15		96		19.20		17.28		17

What does this mean? How are handicaps calculated?
Handicap Projection for Bill Holly for Week 20

If your next round score is:		Your new Handicap will be:
35-40		15
41-45		16
46-51		17
52-56		18
57-62		19