fee += (getFee(i) * tokenPrice) / 1e18;
 function getPriceAndFee(uint256 shareCount, uint256 amount)
        external
        view
        override
        returns (uint256 price, uint256 fee)
    {
        for (uint256 i = shareCount; i < shareCount + amount; i++) {
            uint256 tokenPrice = priceIncrease * i;
            price += tokenPrice;
-            fee += (getFee(i) * tokenPrice) / 1e18;
+            fee += (getFee(i) * tokenPrice);
        }
+            fee = fee / 1e18;
    }
