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

### Instruction:
Twenty people pre-bought plane tickets at a price of $155 per ticket. Thirty people bought their plane tickets at the gate and they each paid $200 for their ticket. How many more dollars did the people at the gate pay for their tickets than those passengers that pre-bought their tickets?

### Response:
 Watu ambao walikatia tiketi zao mapema walilipa jumla ya 20*155=<<20*155=3100>>3100 dola.
Watu ambao walikatia tiketi zao kwenye geti walilipa 30*200=<<30*200=6000>>6000 dola.
Tofauti katika kiasi cha pesa kilicholipwa kwa tiketi ni 6000-3100=<<6000-3100=2900>>2900 dola.