Hello Francisca,
The overheads that occurred in the period will still be the same in 10.1 c), there is no change to that. But the fact that the company estimated a budgeted overhead rate of 4€ can lead to them having to register Over-recovery or Under-recovery of overheads if the budgeted allocation rate is different from the real allocation rate. And that is the case in this exercise.
If you look at the P&L from 10.1a, COGS will sum up yo 41.253.000, but the COGS in P&L of 10.1c will be only 40.478.000. That happens because the 4€ of budgeted overhead allocation rate was an underestimation. Because of that, you will need to register Under-recovery of overhead of 775.000, and the Operating profit will be the same in both P&Ls.
Hope this helps!
Pedro Perdigão