JAKARTA, April 30 (Reuters) - Indonesia has set its crude palm oil (CPO) reference price for May at $877.28 per metric ton, a Trade Ministry official said on Tuesday, up from $857.62 in April.

The new reference price would put the export tax for CPO at $52 per ton and levy at $90, unchanged from this month's rates.

(Reporting by Dewi Kurniawati Writing by Fransiska Nangoy; Editing by John Mair)