diff --git a/src/FeeCalculator.sol b/src/FeeCalculator.sol
index a8b5a6c..6851fa5 100644
--- a/src/FeeCalculator.sol
+++ b/src/FeeCalculator.sol
@@ -166,7 +166,7 @@ contract FeeCalculator is IFeeCalculator, Ownable {
         require(depositAmount > 0, "depositAmount must be > 0");
 
         feeDistribution =
-            _calculateFee(_getTotalSupply(pool), IPool(pool).totalPerProjectSupply(tco2), depositAmount, _getDepositFee);
+            _calculateFee(depositAmount, IPool(pool).totalPerProjectSupply(tco2), _getTotalSupply(pool), _getDepositFee);
     }
 
     /// @notice Calculates the fee shares and recipients based on the total fee.
@@ -210,7 +210,7 @@ contract FeeCalculator is IFeeCalculator, Ownable {
         uint256 redemptionAmount = redemptionAmounts[0];
 
         feeDistribution = _calculateFee(
-            _getTotalSupply(pool), IPool(pool).totalPerProjectSupply(tco2), redemptionAmount, _getRedemptionFee
+            redemptionAmount, IPool(pool).totalPerProjectSupply(tco2), _getTotalSupply(pool), _getRedemptionFee
         );
     }
 
@@ -230,7 +230,7 @@ contract FeeCalculator is IFeeCalculator, Ownable {
         require(depositAmount > 0, "depositAmount must be > 0");
 
         feeDistribution = _calculateFee(
-            _getTotalSupply(pool), IPool(pool).totalPerProjectSupply(erc1155, tokenId), depositAmount, _getDepositFee
+            depositAmount, IPool(pool).totalPerProjectSupply(erc1155, tokenId), _getTotalSupply(pool), _getDepositFee
         );
     }
 
@@ -255,9 +255,9 @@ contract FeeCalculator is IFeeCalculator, Ownable {
         uint256 redemptionAmount = redemptionAmounts[0];
 
         feeDistribution = _calculateFee(
-            _getTotalSupply(pool),
-            IPool(pool).totalPerProjectSupply(erc1155, tokenId),
             redemptionAmount,
+            IPool(pool).totalPerProjectSupply(erc1155, tokenId),
+            _getTotalSupply(pool),
             _getRedemptionFee
         );
     }
@@ -394,9 +394,9 @@ contract FeeCalculator is IFeeCalculator, Ownable {
     }
 
     function _calculateFee(
-        uint256 totalPoolSupply,
-        uint256 projectSupply,
         uint256 requestedAmount,
+        uint256 projectSupply,
+        uint256 totalPoolSupply,
         function(uint256, uint256, uint256) view returns (uint256) calculator
     ) internal view returns (FeeDistribution memory) {
         require(requestedAmount > 0, "requested amount must be > 0");
diff --git a/src/interfaces/ITCO2.sol b/src/interfaces/ITCO2.sol
deleted file mode 100644
index fdb59ee..0000000
--- a/src/interfaces/ITCO2.sol
+++ /dev/null
@@ -1,31 +0,0 @@
-// SPDX-FileCopyrightText: 2024 Toucan Protocol
-//
-// SPDX-License-Identifier: UNLICENSED
-
-// If you encounter a vulnerability or an issue, please contact <info@neutralx.com>
-pragma solidity ^0.8.13;
-
-struct VintageData {
-    /// @dev A human-readable string which differentiates this from other vintages in
-    /// the same project, and helps build the corresponding TCO2 name and symbol.
-    string name;
-    uint64 startTime; // UNIX timestamp
-    uint64 endTime; // UNIX timestamp
-    uint256 projectTokenId;
-    uint64 totalVintageQuantity;
-    bool isCorsiaCompliant;
-    bool isCCPcompliant;
-    string coBenefits;
-    string correspAdjustment;
-    string additionalCertification;
-    string uri;
-    string registry;
-}
-
-/// @title ITCO2
-/// @notice This interface defines methods exposed by the TCO2
-interface ITCO2 {
-    /// @notice Get the vintage data for the TCO2
-    /// @return vintageData Vintage data of the TCO2
-    function getVintageData() external view returns (VintageData memory vintageData);
-}
diff --git a/test/TestUtilities.sol b/test/TestUtilities.sol
index e42ea05..65c3043 100644
--- a/test/TestUtilities.sol
+++ b/test/TestUtilities.sol
@@ -7,8 +7,6 @@ pragma solidity ^0.8.0;
 
 import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
 
-import {VintageData} from "../src/interfaces/ITCO2.sol";
-
 library TestUtilities {
     function sumOf(uint256[] memory numbers) internal pure returns (uint256) {
         uint256 sum = 0;
@@ -95,21 +93,4 @@ contract MockToken is IERC20 {
     function totalSupply() external pure returns (uint256) {
         return 0;
     }
-
-    function getVintageData() external pure returns (VintageData memory) {
-        return VintageData({
-            name: "test",
-            startTime: 0,
-            endTime: 0,
-            projectTokenId: 1,
-            totalVintageQuantity: 0,
-            isCorsiaCompliant: false,
-            isCCPcompliant: false,
-            coBenefits: "",
-            correspAdjustment: "",
-            additionalCertification: "",
-            uri: "",
-            registry: ""
-        });
-    }
 }