This sentence tests subject verb agreement with the 'neither...nor' construction. When two subjects are joined by 'neither...nor', the verb agrees with whichever subject sits closer to it, not with the subject furthest away. The underlined part reads: 'Neither the manager nor the Cashier were able to'.
The corrected phrase, 'Neither the manager nor the Cashier was able to', is right because it fixes the agreement error while keeping 'neither...nor' as the joining pair.
Let's summarize:
So the corrected sentence reads 'Neither the manager nor the Cashier was able to report on the Company's progress'.
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?