Below is an instruction that describes a task. Write a response that appropriately completes the request in German. Please answer in German.

### Instruction:
 In Mary's class, there are 25 students. Their teacher told them they could pay $50 each to finance a big science project that they and their society would benefit greatly from. They all paid the full amount except for 4 students, who paid half. How much was the class able to gather together?


### Response:
 Die ursprünglichen 25 - 4 = <<25-4=21>>21 Schüler zahlten den vollen Betrag, was bedeutet, dass sie insgesamt 21 * $50 = $<<21*50=1050>>1050 sammeln konnten.
Die 4 Schüler, die jeweils die Hälfte zahlten, zahlten $50/2 = $<<50/2=25>>25.
Die 4 Schüler zahlten also insgesamt $25*4 = $<<4*25=100>>100.
Daher konnten sie insgesamt $1050 + $100 = $<<1050+100=1150>>1150 sammeln.