XYZ Company is considering different methods of concentrating cash from its subsidiary accounts to its...

XYZ Company is considering different methods of concentrating cash from its subsidiary accounts to its main operating account. It uses short-term borrowings with a rate of 7% to fund daily operations, and the reserve adjusted earnings credit rate on its subsidiary accounts is 1%. A review of its bank fees shows that wires (same day transfer) cost the XYZ Co. $7.00 each while ACH debits (next day transfer) cost $1.25 each. If the primary objective is to minimize costs, what must the transfer amount be (rounded to the nearest whole $) to justify the use of a wire transfer instead of an ACH to concentrate the funds?