When do you know when they want Pension expense or cost

So, I was reviewing through the Atlantic power reserve vignette again.

According to them

Total Periodic Pension Cost is -Periodic cost

Peroidc Pension cost - Peroidc expense

Anyone else find where else they might be asking for expense or cost?

I would stick with anything but Total Periodic Pension Cost as pension expense.

In Exam when they are asking for periodic pension cost then consider it as Pension Expense & when they are asking about total periodic pension then the Total Periodic Pension cost (Cost that is going through I/S & BS)