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

### Instruction:
Bert has a garden shop. He buys his products in a warehouse and sells them for $10 more in his shop. From each sale, he has to pay 10% of the value in tax. One day a client came to his shop and bought a barrel for $90. How Much money did Bert make on this sale?

### Response:
 Bert ananunua pipa katika ghala kwa $90. Anauza pipa hilo katika duka lake kwa $90+$10=$<<90+10=100>>100. Anapaswa kulipa 10% ya thamani kama kodi. Hivyo, analipa $100x10%=$<<100*0.1=10>>10.
Hivyo, anapata $100-$10=$<<100-10=90>>90.