The agreed value of the cargo shall be deemed to be equal to the total amount insured under the primary insurance and al1如果被保险人对保险货物投保了增加价值保险，货物的约定价值应视为增加至承保损失的本保险和所有增加价值保险的保险金额的总和，本保险项下的责任应按本保险金额占此种保险金额总和的比例计算。