Trying to add 'Request a Quote' code to my website

New Member
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Hi - I am trying to add request a quote button to all products and their variants, which will enable customers to add products to an enquiry page. I have enough understanding of coding and i think i can do that myself if can get some help from experts at shopify. Will highly appreciate if somebody can guide how can i edit code and what should be the code edit?

I don't think paying >$100 yearly for this functionality seems reasonable.