function rebase() external {
        ...
    uint256 yetiTokenBalance = yetiToken.balanceOf(address(this));
    uint256 valueOfContract = _getValueOfContract(yetiTokenBalance);
    uint256 additionalYetiTokenBalance = ...
    if (yetiTokenBalance < additionalYetiTokenBalance) {
            additionalYetiTokenBalance = yetiTokenBalance;
    }
    effectiveYetiTokenBalance = effectiveYetiTokenBalance.add(additionalYetiTokenBalance);
...
function _getValueOfContract(uint _yetiTokenBalance) internal view returns (uint256) {
    uint256 adjustedYetiTokenBalance = _yetiTokenBalance.sub(effectiveYetiTokenBalance);
    uint256 yusdTokenBalance = yusdToken.balanceOf(address(this));
    return div(lastBuybackPrice.mul(adjustedYetiTokenBalance), (1e18)).add(yusdTokenBalance);
}
function rebase() external {
    ...
    uint256 adjustedYetiTokenBalance = (yetiToken.balanceOf(address(this))).sub(effectiveYetiTokenBalance);
    uint256 valueOfContract = _getValueOfContract(adjustedYetiTokenBalance);
    uint256 additionalYetiTokenBalance = ...
    if (additionalYetiTokenBalance > adjustedYetiTokenBalance) {
            additionalYetiTokenBalance = adjustedYetiTokenBalance;
    }
    effectiveYetiTokenBalance = effectiveYetiTokenBalance.add(additionalYetiTokenBalance);
...
function _getValueOfContract(uint _adjustedYetiTokenBalance) internal view returns (uint256) {
    uint256 yusdTokenBalance = yusdToken.balanceOf(address(this));
    return div(lastBuybackPrice.mul(_adjustedYetiTokenBalance), (1e18)).add(yusdTokenBalance);
}
