In C2 enter "General Manager". In C3 enter formula
=IF(C2="","",IF(COUNTIF(C2,"*manager*"),15,5))%

Now in C2 change that to "Receptionist" and check what is displayed in C3.

I don't get it, the whole thing..

Anyway, I uploaded my sample to this link
http://two.xthost.info/cloudstrife/Sample.xlsx

I explain again what I want, based on the sample, I want to know whether
they are manager or not, so based on their job title, there will be something
like general manager and so on, so I want excel to detect whether the cell in
column a has manager this word, then it will use the 15% X the loan amount,
and if there is no manager word in the job title, it will use 5% X the loan
amount. This is what I need.