ANSWER:

You must pay the zakat for all those years by estimating the selling price during each year and giving 2.5% of it, if it had reached Nisab, besides repenting to Allah. 

https://youtu.be/iGjpG08SLWI

Sheikh I didn’t pay zakaat on my gold for last seven years. I want to pay from now on. Is the old zakat still payable by me? How to pay zakat for my previous seven years? How to account for different gold prices during those seven years?

Zakat | May 9, 2018 4:51 pm
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Can i give my zakat to my aunty (father’s sister) so she can do umrah. she is not married she does not has father and brother… We live together and share the expenses. It means can i give money in order to assist her to do umrah not giving all money but as mush as my zakat?
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Sheikh i am under debt,and collecting money for it.Am i obliged to pay the zakat from this money