This course is limited to 12 people and costs $150.

这门课程限招12人，费用为$150。

《柯林斯英汉双解大词典》

The reason, of course, is that costs have rocketed and ticket prices have stayed low.

原因当然是成本飞涨，而票价一直保持在低位。

youdao

The "clearing course" costs $3812, but to get to the highest level, the devotee shells out $14, 295.

“净化课程”的学费是3812美元，但要获得最高级别，信徒得付上14295美元。

youdao

Course costs vary with the length and intensity of the programs.

CNN: Costs vary with length, location

And of course total costs are what really interests people, not solely labour costs.

FORBES: Reshoring, Onshoring: the Opposite of Offshoring Anyway

But, of course, costs are rising with inflation while the demand for some services is also increasingly rising.

BBC: Councils setting out budget plans