Handicap Calculation for John Machado for Week 19

Week of Rounds Used:		18	17	16	15	14		Total		Average		90%		Rounded to:
Gross Score:		42	50	48	50	50		240		48.00
Hdcp Score (over Par):		7	15	13	15	14		64		12.80		11.52		12

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

If your next round score is:		Your new Handicap will be:
38-43		10
44-48		11
49-54		12
55-59		13
60-65		14