2.24 The Borrower shall then evaluate and compare the financial proposals in accordance with the following procedures. Prices shall be converted to a single currency selected by the Borrower (local currency or fully convertible foreign currency) as stated in the RFP. The Borrower shall make this conversion by using the selling (exchange) rates for those currencies quoted by an official source (such as the Central Bank) or by a commercial bank or by an internationally circulated newspaper for similar transactions. The RFP shall specify the source of the exchange rate to be used and the date of that exchange rate, provided that the date shall not be earlier than four weeks prior to the deadline for submission of proposals, nor later than the original date of expiration of the period of validity of the proposal. For a time-based contract,38 any arithmetical errors shall be corrected, and prices shall be adjusted if they fail to reflect all inputs that are included in the respective technical proposals. For a lump-sum contract, the consultant is deemed to have included all prices in its financial proposal, so neither arithmetical corrections nor price adjustments shall be made, and the total price, net of taxes understood as per paragraph 2.25 below, included in the financial proposal shall be considered as the offered price.