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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def convert_to_mb(s):
 """Convert memory size from GB to MB."""

    s = s.upper()
    try:
        if s.endswith('G'):
            return float(s[:-1].strip()) * 1024
        elif s.endswith('T'):
            return float(s[:-1].strip()) * 1024 * 1024
        else:
            return float(s[:-1].strip())
    except (IndexError, ValueError, KeyError, TypeError):
        errmsg = ("Invalid memory format: %s") % s
        raise exception.SDKInternalError(msg=errmsg)