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BigDecimal partsCost = mtRecordCosts.stream().map(MtRecordCost::getPartsCost).reduce(BigDecimal.ZERO, (m1, m2) -> m1.add(m2));
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BigDecimal partsCost = mtRecordCosts.stream().map(MtRecordCost::getPartsCost).reduce(BigDecimal.ZERO, (m1, m2) -> m1.add(m2));
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