Numbers to Excel converted file is not working

Hi Community,

i had to convert a numbers file on my windows computer into a xls via cloudconverter. Its an inventory sheet which is supposed to calculate the cost value of different products. But even tho everything shows in the converted xls file it doesnt calculate anything when I f.e. change the number of products, hence, the xls file is not working.

Can someone help please?

Thank you!