Here is the original item:
His arms full of expensive science fiction
paperbacks,
(A) Cary
remembered (B)
that next semester's tuition was due in two
weeks. (C)
Making a trip to the library instead of the bookstore a better financial
decision.
You wanted to do this:
His arms full of expensive science fiction paperbacks,
Cary remembered,
that next semester's tuition was due in two weeks. Making a trip
to the library instead of the bookstore a better financial decision.
Adding a comma after remembered is an error. You seldom use a comma to attach a subordinate clause to the main clause in front.
You might want to review the rules.