diff --git a/contracts/mockups/UsingWitOracle.sol b/contracts/mockups/UsingWitOracle.sol
index 09e0e786..6cc3dea5 100644
--- a/contracts/mockups/UsingWitOracle.sol
+++ b/contracts/mockups/UsingWitOracle.sol
@@ -81,13 +81,14 @@ abstract contract UsingWitOracle
     }
 
     /// @dev Estimate the minimum reward required for posting a data request (based on `tx.gasprice`).
-    function _witOracleEstimateBaseFee()
-        virtual internal view
-        returns (uint256)
-    {
+    function _witOracleEstimateBaseFee() virtual internal view returns (uint256) {
+        return _witOracleEstimateBaseFee(tx.gasprice);
+    }
+
+    function _witOracleEstimateBaseFee(uint256 _evmGasPrice) virtual internal view returns (uint256) {
         return (
-            (100 + __witOracleBaseFeeOverheadPercentage)
-                * __witOracle.estimateBaseFee(tx.gasprice) 
+            __witOracle.estimateBaseFee(_evmGasPrice)
+                * (100 + __witOracleBaseFeeOverheadPercentage)
         ) / 100;
     }
 }
diff --git a/contracts/mockups/WitOracleConsumer.sol b/contracts/mockups/WitOracleConsumer.sol
index 6abced5c..5b15bcfe 100644
--- a/contracts/mockups/WitOracleConsumer.sol
+++ b/contracts/mockups/WitOracleConsumer.sol
@@ -34,26 +34,18 @@ abstract contract WitOracleConsumer
     /// ===============================================================================================================
     /// --- WitOracleConsumer virtual methods ----------------------------------------------------------------------------
 
-    /// @dev Estimate the minimum reward required for posting a data request (based on `tx.gasprice` and 
-    /// @dev `__witOracleCallbackGasLimit`).
-    function _witOracleEstimateBaseFee() virtual override internal view returns (uint256) {
-        return _witOracleEstimateBaseFeeWithCallback(__witOracleCallbackGasLimit);
-    }
-
-
-    /// @dev Estimate the minimum reward required for posting a data request, based on `tx.gasprice` and
-    /// @dev the given `_witOracleCallbackGasLimit` value.
-    /// @param _witOracleCallbackGasLimit Maximum gas to be spent when reporting the data request result.
-    function _witOracleEstimateBaseFeeWithCallback(
-            uint24 _witOracleCallbackGasLimit
-        )
-        virtual internal view returns (uint256)
+    /// @dev Estimate the minimum reward required for posting a data request (based on given gas price and 
+    /// @dev immutable `__witOracleCallbackGasLimit`).
+    function _witOracleEstimateBaseFee(uint256 _evmGasPrice)
+        virtual override 
+        internal view 
+        returns (uint256)
     {
         return (
             (100 + __witOracleBaseFeeOverheadPercentage)
                 * __witOracle.estimateBaseFeeWithCallback(
-                    tx.gasprice, 
-                    _witOracleCallbackGasLimit
+                    _evmGasPrice, 
+                    __witOracleCallbackGasLimit
                 )
         ) / 100;
     }
diff --git a/contracts/mockups/WitOracleRequestConsumer.sol b/contracts/mockups/WitOracleRequestConsumer.sol
index b4ffb8df..ff82893e 100644
--- a/contracts/mockups/WitOracleRequestConsumer.sol
+++ b/contracts/mockups/WitOracleRequestConsumer.sol
@@ -24,15 +24,15 @@ abstract contract WitOracleRequestConsumer
         WitOracleConsumer(_callbackGasLimit)
     {}
 
-    /// @dev Estimate the minimum reward required for posting a data request (based on `tx.gasprice` and 
-    /// @dev `__witOracleCallbackGasLimit`).
-    function _witOracleEstimateBaseFee() 
-        virtual override(UsingWitOracle, WitOracleConsumer)
-        internal view
+    /// @dev Estimate the minimum reward required for posting a data request (based on given gas price and 
+    /// @dev immutable `__witOracleCallbackGasLimit`).
+    function _witOracleEstimateBaseFee(uint256 _evmGasPrice)
+        virtual override (UsingWitOracle, WitOracleConsumer)
+        internal view 
         returns (uint256)
     {
-        return WitOracleConsumer._witOracleEstimateBaseFee();
-    } 
+        return WitOracleConsumer._witOracleEstimateBaseFee(_evmGasPrice);
+    }
 
     /// @dev Pulls a data update from the Wit/oracle blockchain based on the underlying `witOracleRequest`,
     /// @dev the default `__witOracleDefaultQuerySLA` data security parameters and the immutable value of
diff --git a/contracts/mockups/WitOracleRequestTemplateConsumer.sol b/contracts/mockups/WitOracleRequestTemplateConsumer.sol
index d809fe03..11ae2ba2 100644
--- a/contracts/mockups/WitOracleRequestTemplateConsumer.sol
+++ b/contracts/mockups/WitOracleRequestTemplateConsumer.sol
@@ -24,14 +24,14 @@ abstract contract WitOracleRequestTemplateConsumer
         WitOracleConsumer(_callbackGasLimit)
     {}
 
-    /// @dev Estimate the minimum reward required for posting a data request (based on `tx.gasprice` and 
-    /// @dev `__witOracleCallbackGasLimit`).
-    function _witOracleEstimateBaseFee()
-        virtual override(UsingWitOracle, WitOracleConsumer)
-        internal view
+    /// @dev Estimate the minimum reward required for posting a data request (based on given gas price and 
+    /// @dev immutable `__witOracleCallbackGasLimit`).
+    function _witOracleEstimateBaseFee(uint256 _evmGasPrice)
+        virtual override (UsingWitOracle, WitOracleConsumer)
+        internal view 
         returns (uint256)
     {
-        return WitOracleConsumer._witOracleEstimateBaseFee();
+        return WitOracleConsumer._witOracleEstimateBaseFee(_evmGasPrice);
     }
 
     /// @dev Pulls a fresh update from the Wit/oracle blockchain based on some data request built out