As your total disposal proceeds exceeded four times the annual CGT exemption, you will need to disclose the sales regardless of whether you made net gains or net losses. However, if you can prove joint ownership, then the £44,000 limit applies to each individual but you would still need to disclose your respective shares of any gains if those gains exceeds the £11,000 annual CGT exemption you each have.
Your disposals could be covered by the rules for chattels as set out in HS293 here
. As it says at the top of Part 2, you don't need to calculate a gain or loss on any item which you sold for £6,000 or less. There are examples of the calculation of the gain which may apply to the items you sold for more than £6,000. There are is also a note on calculation of losses.
On the face of it, you could exclude all those items that were sold individually for no more than £6,000. However, it's possible that HMRC may claim that where some items were sold together or as a set, the £6,000 limit should apply to the set. Part 3 of HS293
has notes on this.
You have to attach a calculation of the gains and losses to your tax return so you would be well advised to use the HMRC online tax return software to disclose each transaction that needs to be disclosed. It provides you with a template that you can use for each sale and tots up the gains and losses for you. The result will be attached automatically to your return before submission.
I hope this helps but let me know if you have any further questions.