how to get combined_rate value from below json data
{
"rate": {
"zip": "10005",
"state": "NY",
"state_rate": "0.04",
"county": "NEW YORK",
"county_rate": "0.0",
"city": "NEW YORK CITY",
"city_rate": "0.045",
"combined_district_rate": "0.00375",
"combined_rate": "0.08875"
}
}
please help on this thanks in advance