How to calculate the customs exemption limit on other capital goods rather than imported as investment in stock?

Under the Article 121.3.1 of the Special Tax Treatment Act, capital goods, introduced by a foreign invested company from a foreign investor registered based on the Article 5.1 of the Foreign Investment Promotion Act, and capital goods introduced for investment in stock by a foreign investor, are can be exempted for duties.
Therefore, for the capital goods, except for investment in stock, customs duties can be exempted within the range of investment made from a foreign investor according to notification of FDI, and if the actual investment is less than the required amount to get approval for tax deduction, customs duties abated within the introduced investment.