Tier 2 Dependant visa maintenance fund from (main and dependant personal account "adding both accounts")

[vidan]

The wife was on tier 2 general and now on ILR since last year. I am applying for tier 2 dependant visa extension next month (alone) my (ILR is in 2 years time) so need to extend my dependant visa, Sadly the fund went down to £400 in my account due to direct debit.

But during that period of time, Wife had £300 in her account.

My question. cumulative (£300 from her account and £400 from my account) is allowed to show maintenance fund?

Minimum fund to show is 630, so arent we above the limit