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

{ "offers": [ { "sales_reference": "001018766300877 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018766302469 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018766302089 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018766302329 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018766301974 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018766301222 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018766301313 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018766301685 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018766302154 ", "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": "001018766300877___,001018766302469___,001018766302089___,001018766302329___,001018766301974___,001018766301222___,001018766301313___,001018766301685___,001018766302154___", "delivery_get_method": { "delivery_type": "home_delivery", "center_id": "0130" } }