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

### Instruction:
Dorothy is 15 years old and wants to go to a museum with her family. Her family consists of her, her younger brother, her parents, and her grandfather. The regular ticket cost is $10. People 18 years old or younger have a discount of 30%. How much money will Dorothy have after this trip, when she currently has $70?

### Response:
 Ndugu yake Dorothy ana umri wa miaka 10, hivyo ana punguzo.
Punguzo kwa tiketi moja ni 10 * 30/100 = $3.
Hivyo tiketi ya ndugu yake Dorothy itagharimu 10 - 3 = $7.
Familia ya Dorothy inajumuisha watu 5, hivyo gharama ya tiketi ni 5 * 10 = $50.
Familia ya Dorothy inapata punguzo kwa watu 2, hivyo punguzo jumla ni 2 * 3 = $6.
Jumla ya familia ya Dorothy italazimika kulipa 50 - 6 = $44.
Dorothy atabakiwa na 70 - 44 = $26.