Astate offers two lottery games, winone and playball. both games cost $2 per ticket.

in winone, the player picks a single letter from a to j and a single digit from 0 to 9. if both the letter and the digit match the letter and the digit picked on that day, the player wins $150.
in playball, the player picks a single letter from a to t and a single digit from 0 to 9. if both the letter and the digit match the letter and the digit picked on that day, the player wins $280.
if mr. boyle played winone lottery 100 times and won twice, what were his net winnings per turn?
a: $1
b: $2.5
c: $3
d: $4