Need to multiply cells based on text critaria/information

Hi all,

Hope u guys doing well. I am making an Invoice. where i need to input data based on PCS. Please help me to find out the solution. it would be highly appreciated.

NEED A FORMULA IN THE YELLOW CELL LIKE, IF B8 CONTAINS TEXT (5PCS/PACK), THEN F10 WILL BE MULTIPLIED BY F6 CELL*5, AND IF B8 CELL CONTAIN (3 PCS/PACK), THEN F10 WILL BE CALCULATED BY F6*3

Attaching file.

Use

=F6*MID(B8,2,1)

Thanks