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

### Instruction:
Stefan goes to a restaurant to eat dinner with his family. They order an appetizer that costs $10 and 4 entrees that are $20 each. If they tip 20% of the total for the waiter, what is the total amount of money that they spend at the restaurant?

### Response:
 Gharama jumla ya vyakula vikuu ni 4 * $20 = $<<4*20=80>>80.
Gharama jumla ya chakula cha jioni ni $80 + $10 = $<<80+10=90>>90.
Bahasha ni $90 * 0.20 = $<<90*0.20=18>>18
Gharama jumla na bahasha ni $90 + $18 = $<<90+18=108>>108