With your second question your second option was correct, add up the prices of all your winners then divide this amount by the total wins.

Lets say i had 20 winners and there combined win prices equaled $80
$80/20 = average price $4.00
Some people will also remove the highest priced and lowest priced winner and divide the total remaining by 18 this would only need to be done if you had 1 large priced winner.

I think there is a formula for taking in to account the high and lower prices but i can't remember where i seen it.

__________________
One Drive

"If the corporates are treating you poorly , just go elsewhere."
"If they need you , they will soon find out."
"If you need them , you will soon find out." --moeee
_______________________________________________