I snared Mitanni for the win but backed my treble in 'treble yell' [1 unit only $24] and 'she in doors' collected $314 VIC tab. I got the $14!

Odds were: r5/$14[something] x r6/$2.80 x r7/$6.30

I was shocked at the large parley divvy for $1. Anyone know how they work out these parley divs. as they are a new betting type to me?