package cn.iocoder.yudao.module.erp.service.statistics;

import java.math.BigDecimal;
import java.math.RoundingMode;

final class PurchasePriceMetrics {
    private PurchasePriceMetrics() {}

    static BigDecimal changeRate(BigDecimal latest, BigDecimal previous) {
        if (latest == null || previous == null || previous.signum() == 0) return null;
        return latest.subtract(previous).multiply(BigDecimal.valueOf(100))
                .divide(previous, 2, RoundingMode.HALF_UP);
    }
}