I want to make $50 a week form my betting and I usually bet up to 10 horses/sports teams a week.

I'm starting with $50 for the first week. There are 4 sports teams and 1 race with 2 horses.

The odds are:

Team A $1.50
Team B $1.43
Team C $2.40
Team D $1.25

Race 3

#2 $2.30
#4 $4.60

How should I bet to make my profit