April 30 (Reuters) - Northern Star Resources Ltd NST.AX :
* GOLD SOLD IN MARCH QUARTER TOTALLED 119,976OZ VERSUS 132,558 OZ OF GOLD SOLD A YEAR AGO
* ALL-IN SUSTAINING COSTS (AISC) WERE A$1,075/OZ IN MARCH QUARTER
* JUNE QUARTER PRODUCTION FORECAST TO EXCEED 150,000OZ
* NARROWED ITS FY2018 GUIDANCE TO 540,000-560,000OZ AT AN AISC OF A$1,000-A$1,050/OZ