Thanks @kettle and @vinorus bros.
Yes, the gst is 6% . But due to my freight is foc so custom put 10% of selling price as freight. Then custom dept charge a further 10% as service fee for parcel value above RM 1000.
So my GST amount is RM 138.50 for item value at RM 1,970.55.
I didn't argue and just paid everything as told.