We need following customization in POS, can we do it? or we have to ask you?

We need some customisation in your POS, can please suggest after checking below requirement.

Sure, we would like to add search filter and it will have following filters.
Following are custom fields and we have already set them up in the woocommerce add product section. So we would like them to display in the search section so that if customer asks for a specific product we can filter them out for them
1) Ring Size
2) Gross Weight
3) Price
4) Group
5) Gender
6) Carat
7) Tags (Woo-commerce default)
8) Metal Color
9) Spouse 1 (This is Diamond type based on the group selection, Mainly two types of spouse1 )
10 ) Spouse 2 (This is stone type based on group selection, Mainly two types of spouse 2 )

Customization 2 (Add to cart : BILL VIEW)
We need to display, various custom fields such as Net weight, gross weight, Wastage, carat, fine weight etc. These are all added in the woocommerce add product section. So when we add the product to cart, in your dropdown or a popup should display all of these details and its calculations. Some simple calculation might be there.

Customization 3 (Custom fields in INVOICE)
We need same fields added in the cart, want them in the invoice.

Customization 4 ( BARCODE/ TAG)
Can please provide cost for this and time you would take?
We would like to display various fields mentioned above in the Barcode, and want QR code in it.

I am available to discuss on skype if you want.
Please provide me total hours need for each customization. and hours needed.