conditional offer at manchester University

so i applied to few unis few days ago and got a conditional offer from manchester University today. Although, they said "This offer is subject to you obtaining GCE A level Grade A*in Economics". But the problem is getting an A* is not possible for me no matter how hard i work since i already did unit 3 and unit 2 and got Bs. i'm currently doing unit 1 and unit 4 therefore, even though i get an A* for unit 4 overall after cash in it wont count as a an A*. I got straight A's for other two subjects i did and its completed.
I just wanna know will they accept me even if i get 3A's rather than A* for econ?? i know its a conditional offer but i wanna know so i wont keep my hopes up.

I got a conditional offer to study LLB at the University of Manchester as an international student. The subject requirement for IB students is almost as high as Cambridge or Oxford (it's a 7, 6, 6). It doesn't seem possible for me as well. Though I have reached out to the admission, they don't really care about the burden it has on students, especially for international ones. At this point, I just study as hard as possible. Uom's requirement tough. Good luck, hoping to see you there.