costings怎么读

We'll put together a proposal, including detailed costings, free of charge.我们将免费拟一份提案，其中包括详细的成本估算。They agreed with our proposal in principle, but have asked us to prepare some detailed costings.他们在总的原则上同意我们的建议, 但要求我...

n.成本计算( costing的名词复数 )...