FBDI Mass Additions enter different cost, invoice cost, depreciation reserve for TAX book currency

We want to enter NGN currency amounts in NG NGN STAT2(this is a tax book for NG USD CORP). All amounts entered in the FBDI are taken as USD. We want to have different conversion rates for cost, depreciation reserve and invoice cost columns for each line in the FBDI. Currently when we populate any rate in FA_MC_RATES tab it is used as a multiplier for all columns(cost, depreciation reserve, invoice cost etc.). Is there a way to enter a different rate for each column, or enter NGN amounts directly in the tax book.