Laying multiples / accumulators 'manually'

[s7v7n]

Thats the fun part.

The lay odd at betfair is about 2.90 now for the second bet. Hope Borussia wins so I can lay this one.

So if the lay odd is 2.9...... willlay for £91.97 for a 15 profit or so right?

[s7v7n]

Borussia just scored!

[Nintendo2k]

Yes that sounds about right s7v7n. Except it is more like £12.37 assuming you are at 5% comission.
Optimally you should lay £91.71 at 5% for a £12.87 profit.