function _submitInOrders(
    uint256 _nftId,
    IERC20 _inputToken,
    uint256 _inputTokenAmount,
    Order[] calldata _orders,
    bool _reserved,
    bool _fromReserve
) private returns (uint256 feesAmount, IERC20 tokenSold) {
    _inputToken = _transferInputTokens(_nftId, _inputToken, _inputTokenAmount, _fromReserve);
    uint256 amountSpent;
    for (uint256 i = 0; i < _orders.length; i++) {
        amountSpent += _submitOrder(address(_inputToken), _orders[i].token, _nftId, _orders[i], _reserved);
    }
    feesAmount = _calculateFees(_msgSender(), amountSpent);
    assert(amountSpent <= _inputTokenAmount - feesAmount); // overspent

    // If input is from the reserve, update the records
    if (_fromReserve) {
        _decreaseHoldingAmount(_nftId, address(_inputToken), _inputTokenAmount);
    }

    _handleUnderSpending(_inputTokenAmount - feesAmount, amountSpent, _inputToken);

    tokenSold = _inputToken;
}
function _submitInOrders(
    uint256 _nftId,
    IERC20 _inputToken,
    uint256 _inputTokenAmount,
    Order[] calldata _orders,
    bool _reserved,
    bool _fromReserve
) private returns (uint256 feesAmount, IERC20 tokenSold) {
    _inputToken = _transferInputTokens(_nftId, _inputToken, _inputTokenAmount, _fromReserve);
    uint256 amountSpent;
    for (uint256 i = 0; i < _orders.length; i++) {
        amountSpent += _submitOrder(address(_inputToken), _orders[i].token, _nftId, _orders[i], _reserved);
    }
    feesAmount = _calculateFees(_msgSender(), amountSpent);
    assert(amountSpent <= _inputTokenAmount - feesAmount); // overspent

    // If input is from the reserve, update the records
    if (_fromReserve) {
        _decreaseHoldingAmount(_nftId, address(_inputToken), amountSpent+feesAmount);
    }

    ExchangeHelpers.setMaxAllowance(_token, address(feeSplitter));
    feeSplitter.sendFees(_token, feesAmount);

    if (_inputTokenAmount > amountSpent + feesAmount) {
        _inputToken.transfer(_fromReserve ? address(reserve) : _msgSender(), _inputTokenAmount - amountSpent - feesAmount);
    }

    tokenSold = _inputToken;
}
