The range (Amt) from A1 to A300
may contain empty cells, numbers with leading
letter "c" like c15, c-19 and also may contain normal numbers like 1,3,88
and so on.

I'm seeking to sum ONLY amounts with the letter "c", I have an array formula
=SUM(--(IF(LEFT(A1:A300)="c",REPLACE((A1:A300),1,1,""))))
which can do the task, in my case this coding portion is a part of a bigger
formula.
So please Help how to write it in normal version
many thanks