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

### Instruction:
Jacob is building ladders. One of his clients needs 10 ladders with 50 rungs, and 20 ladders with 60 rungs. Jacob has to charge $2 for every rung. How much does the client have to pay for the ladders?

### Response:
 Kwa aina ya kwanza ya ngazi, mteja anahitaji kulipa 10 * 50 * 2 = <<10*50*2=1000>>1000 dola.
Kwa aina ya pili ya ngazi, mteja anahitaji kulipa 20 * 60 * 2 = <<20*60*2=2400>>2400 dola.
Jumla ya mteja anahitaji kulipa 1000 + 2400 = <<1000+2400=3400>>3400 dola.