All computations of interest and of fees shall be made by the Agent on the basis of a year of 360 days, in each case for the actual number of days (including the first day but excluding the last day) occurring in the period for which such interest and fees are payable.  Each determination of an interest rate or the amount of a fee hereunder shall be made by the Agent and shall be conclusive, binding and final for all purposes, absent manifest error.