There is no alternative. If JS is disabled calculations will not work. You can still fill in the existing fields, though.
Dear Sir, I see you are working for Adobe.
If there is no other solution, can you provide me with a WhitePaper or Technical Knowledgebase to acquirer an exception at our company?
If there is no such document, I can not continue using Adobe, do you know any alternative software for creating forms besides adobe?
I do NOT work for Adobe. Only people with an Adobe Employee tag under their names do.
There are plenty of PDF viewers out there, but I doubt any of them will allow calculations without JS. It's a part of the PDF Specifications, not something Adobe decided to implement on its own.
Your company has decided to block calculations in PDF. That's all there is to it. Only your company can solve this.