Zakat on Dropshipping Business Continued

Assalamualaikum,

To continue my questions on this topic…

What about paying zakat on items where 50% deposit has been paid and they are currently being manufactured.

Also, since i’m paying zakat on retail price of stock i hold, do i need to take into account the Amazon fees that are fixed - so for example, if the product will retail at £95 and Amazon will take 25 - do i pay zakat on that full 95?

Also, can you please shed light on how to deal with paying zakat if you deal in more than 1 currency, or if i hold cash in more than one currency.

Jazakallah