Problem with a SubReport

[Telesphore]

We have to fill a certificate of tuition fees paid during the school year
for the govern-ment.
The government is asking the sum of months for either Part-Time, either
Full-Time stu-dents during the different terms of the year.
So we have this SubReport control boxes with the following codes:
If it is Part-Time: =IIf([CreditsTotal]<12,Sum([NumberOfMonths]),"")
If it is Full-Time: =IIf([CreditsTotal]>=12,Sum([NumberOfMonths]),"")
This SubReport works fine for the students who were only Part-Time or only
Full-Time in each term of the year.

But how to fill the certificate of a student who was Full-Time during the
Winter term, Part-Time during the Summer term and Full-Time during the Fall
term?

Any help will be appreciated.

Thank you.

 

[KARL DEWEY]

I assume you have a field to record theTerm and therefore add it in criteria.