sum an expression in a query

[Guest]

I have created an expresssion in a query that converts hours and minutes to
decimal times. I would like to add the total decimal times for a month in my
report but I keep getting a message that the expression is too complex. I
have tried using the "sum" operator in the query but then I get the same
message. Anyone know how I can add the column in the report? Putting sum in
the totals column in the Query doesn't work either.

 

[Duane Hookom]

Maybe you could share the "expression".