Spouse Visa Extension new fee

[Walimusa]

Hi, my wife’s visa is starting on BRP from 29/07/21 and expires on 07/01/24. It makes roughly 29 months and 8 days. She entered the Uk on 1st July 2021 on the vignette.
I think i can apply in December 2023 for extension, can someone please advise on New fee and IHS charges if possible,? What sort of money we are looking at to pay. Will highly appropriate the reply. I searched the forum but couldn’t find the exact amount. Thanks in advance.

[CR001]

announces/fees-2018-t228357.html#p2129507