To minimise all risks of refusal it's important to be compliant with the requirements by submitting the evidence/documentation.
If you do not supply the requested documents/evidence, then the application will fall for refusal. That's why it's so important to respond immediately requesting an extension of time.
Follow this link to the UKBA webpage for Financial requirement
The Annex FM 1.7 - Financial Requirement can be found on the right hand side of the webpage under Related Documents.