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

{ "offers": [ { "sales_reference": "001020616900658 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020616900740 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020616900666 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020616900708 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020616900757 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020616900690 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020616901110 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020616900864 ", "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": "001020616900658___,001020616900740___,001020616900666___,001020616900708___,001020616900757___,001020616900690___,001020616901110___,001020616900864___", "delivery_get_method": { "delivery_type": "home_delivery", "center_id": "0130" } }