Fiance' visa help needed please.

Hi,
If some one could advise me on the following please.

I am applying for the fiance' visa but am just little nervous about a situation regarding the finances.My fiancee is currently working at two places and she does about 12 hours at one place and 20 hours at the other every week and she earns 6 pounds per hour at one place and 7-11 pounds an hour at the other place so her income appears on her bank statements with different figures i.e. sometimes over 375 a week(after tax) and some times as low as 80 pounds from both of her jobs so her income is not exactly fixed every week and has savings of over 4000 pounds as well in her savings account which she has saved from her wages.plus i will include my dads statement(letter of financial support as well) to show finances from my side as well (around 5000 pounds roughly).
So i need to know what are our chances to pass the financial test?


regards