Calculate times in cne cell with empty line break at the end

Hello,

I'm new here and have some problem with empty line break at the end of a cell.

Calculate.png


I can't used this formula " =RIGHT(A3;5)-LEFT(A3;5) " that I've used in B3 to calculate hours between two times that separate with line break in one cell A3. My problem is the huge data in excel that I've got every month has empty line break at the end of cells, and it was time wasting to delete one by one just to run that formula.

I did tried using FIND & REPLACE to replace line break (CTRl+J) with nothing, its not working and breaking the cells data.

Any idea ?