    // given # of tokens sold, returns integral of price p(x) = p0 * (1 - k)^(x/r) 

## [NC-01] Typo mistakes
https:

```diff
-    /// @notice Struct to represent an item in the heap by it's ID
+    /// @notice Struct to represent an item in the heap by its ID
-    /// @notice Struct to represent an item in the heap by it's ID
    mapping(uint256 => uint256) public heap;
+    /// @notice Mapping to represent an item in the heap by it's ID
    mapping(uint256 => uint256) public heap;
-        // Ensure to address is not 0
        if (from == address(0)) revert ADDRESS_ZERO();
+        // Ensure from address is not 0
        if (from == address(0)) revert ADDRESS_ZERO();
