Por la compra de 2 unidades iguales o combinadas de los siguientes artículos, GRATIS el de menor importe

{ "offers": [ { "sales_reference": "001020768200667 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020722703335 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020747001392 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020746804580 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020746804572 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020747200242 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020747200283 ", "seller": { "identifier": "001" } } ], "subsite": { "identifier": "supermarketHipercorStore", "parent": { "identifier": "supermarket" } }, "query_params": { "centers": { "home_delivery": "0130" }, "is_full_documentation": false, "is_include_offer_availability": true }, "query_list_get_method": "001020768200667___,001020722703335___,001020747001392___,001020746804580___,001020746804572___,001020747200242___,001020747200283___", "delivery_get_method": { "delivery_type": "home_delivery", "center_id": "0130" } }