How to reduce an Excel file size

Dears,

I have developed two excel files with formulas and images, copy of each excel file as well as the images are attached. Eventually, the files size is large and cannot work on them. I would much appreciate to get the help in this matter and get their size reduces. This is an urgent business matter.

Best regards,

Hesham Sharara

I have made some trials to reduce the excel file size with the help of two software with no success.