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

{ "offers": [ { "sales_reference": "001018389401383 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018394600243 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018389401367 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018394600235 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018389600505 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018389600513 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018389401391 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018389401375 ", "seller": { "identifier": "001" } }, { "sales_reference": "001018394600227 ", "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": "001018389401383___,001018394600243___,001018389401367___,001018394600235___,001018389600505___,001018389600513___,001018389401391___,001018389401375___,001018394600227___", "delivery_get_method": { "delivery_type": "home_delivery", "center_id": "0130" } }