hashUpgradeCost() Netscript Function
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.. js:function:: hashUpgradeCost(upgName, level)

    :RAM cost: 0 GB
    :param string upgName: Name of the Hash upgrade.
    :param number level: Level of the upgrade.
    :returns: Amount of Hash.

    You must have Source-File 5-1 and Source-File 9-1 in order to use this function.

    This function calculates amount of Hash require to buy level ``level`` of upgrade ``upgName``.

    Examples:

    .. code-block:: javascript

        formulas.hacknetServers.hashUpgradeCost("Increase Maximum Money", 5); // returns: 250