The mentioned figure is not the helicopter / unit cost but the total agreement price.
The maintenance and logistics infrastructure for T129 will be established in Pakistan. All of these initial settlement costs included in the total deal price. Pakistan will also receive Roketsan ammunitions (Cirit,Umtas,Temren etc.) with T129. In addition, part of this deal includes the offset contribution(ToT subjects). There are also financing costs arising from long-term loans.
Do not think of it as the price of a bare T129-P. When Pakistan has this infrastructure, the costs of advanced variants will decline dramatically.