Totals from PricingTable1 can automatically become selections (products) for PricingTable2
PricingTable1 builds the quote and the Total generated from this table becomes a variable that can go into the 'Full Payment' option in Table2
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Jason Parks commented
The goal here is to have PricingTable1 be your quote builder and then PricingTable2 helps push a payment option on to your payment portal (whether you pay the full amount as calculated above in PringTable1 or an $X deposit amount the variable being passed from PricingTable1's Total field should be a numeric value that can go into a Total column and not just a <text> field in PricingTable2 as this table should only be able to choose which payment option they want) - the Payment option is what then gets pushed to your integrated Payment provider.