How much FAAB for Murray?

I am 0-4 in a 12 team .5 ppr and need to win now. I have $80 left of $100 budget. Right now I have $53 bid for Murray. Hope that’s enough? Or too much?

Rest of RB are: Lynch; Anderson, Ingram, JStew, T. West

It would be better to win this one, I’d bid high to be safe. Before drafting cook, they gave Murray enough money to be the workhorse.