cost是不可数名词，但做诉讼费时要用可数名词。

cost：n.费用;花费;价钱;成本;(为做某事涉及的)努力，代价，损失。

扩展资料

Let's be practical and work out the cost first.

咱们实际一点儿，先计算一下成本费用。

The cost in terms of human life was high.

付出了很大的生命代价。

And again, we must think of the cost.

再说，我们必须考虑成本。

Just out of interest, how much did it cost?

我只是好奇问问，这个花了你多少钱？

How much will it cost, more or less?

这个大概得花多少钱？