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

{ "offers": [ { "sales_reference": "001020745203156 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745203727 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745203198 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745203164 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745203719 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745203735 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745203966 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745203834 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745203958 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020722703871 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020722703863 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020722703889 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745204212 ", "seller": { "identifier": "001" } }, { "sales_reference": "001020745204204 ", "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": "001020745203156___,001020745203727___,001020745203198___,001020745203164___,001020745203719___,001020745203735___,001020745203966___,001020745203834___,001020745203958___,001020722703871___,001020722703863___,001020722703889___,001020745204212___,001020745204204___", "delivery_get_method": { "delivery_type": "home_delivery", "center_id": "0130" } }