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

{ "offers": [ { "sales_reference": "001020613801149 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020613801628 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020613800190 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020613800265 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020613800323 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020613800141 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020608800353 ", "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": "001020613801149___,001020613801628___,001020613800190___,001020613800265___,001020613800323___,001020613800141___,001020608800353___", "delivery_get_method": { "delivery_type": "home_delivery", "center_id": "0130" } }