I work in Indonesia and I find it incredulous that some of you would even consider working for Merpati.
They have the worst safety record of any airline in the country and regularly stick one of their aeries into the side of a mountain. Only recently, about 6 months ago, they crashed one of their MA60's in Papua as they tried to descend below weather on a VFR only approach, killing all on board.
Also, to pay USD 24k for a type rating you can only ever use with them seems a rip off!! If you really want to fly for Merpati you might as well come see them face to face and they might give you a right hand seat on their widowmaker, the CASA 212, helll they will even pay your type rating
Please think twice before deciding to buy that ticket to Jakarta!