Handicap Calculation for Mike Gallagher for Week 15

Week of Rounds Used:		14	13	9	5	3		Total		Average		90%		Rounded to:
Gross Score:		41	39	43	50	46		219		43.80
Hdcp Score (over Par):		6	4	7	13	11		41		8.20		7.38		7

What does this mean? How are handicaps calculated?