Por la compra de 3 unidades iguales o combinadas de los siguientes artículos, GRATIS el de menor importe

{ "offers": [ { "sales_reference": "001028013503777 ", "seller": { "identifier": "001" } }, { "sales_reference": "001028013503769 ", "seller": { "identifier": "001" } }, { "sales_reference": "001028013503579 ", "seller": { "identifier": "001" } }, { "sales_reference": "001028013503595 ", "seller": { "identifier": "001" } }, { "sales_reference": "001028013503645 ", "seller": { "identifier": "001" } }, { "sales_reference": "001028013202537 ", "seller": { "identifier": "001" } }, { "sales_reference": "001028013202586 ", "seller": { "identifier": "001" } } ], "subsite": { "identifier": "supermarketStore", "parent": { "identifier": "supermarket" } }, "query_params": { "centers": { "home_delivery": "0130" }, "is_full_documentation": false, "is_include_offer_availability": true }, "query_list_get_method": "001028013503777___,001028013503769___,001028013503579___,001028013503595___,001028013503645___,001028013202537___,001028013202586___", "delivery_get_method": { "delivery_type": "home_delivery", "center_id": "0130" } }