def sumOutputSerializeSizes(outputs): # outputs []*wire.TxOut) (serializeSize int) {
    """
    sumOutputSerializeSizes sums up the serialized size of the supplied outputs.

    Args: 
        outputs list(TxOut): Transaction outputs.

    Returns: 
        int: Estimated size of the byte-encoded transaction outputs. 
    """
    serializeSize = 0
    for txOut in outputs:
        serializeSize += txOut.serializeSize()
    return serializeSize