Is it permissible for a partner in a commercial store selling car spare parts to increase the price of goods and take the increment for himself, knowing that his partner does not provide him with many parts, nor does he pay anything towards the store's rent or the worker's wage, nor does he provide goods that suit the income?

This partnership is invalid because it does not fall under the permissible types of jurisprudential partnerships. It must be dissolved, and the profit belongs to the capital owner. The partner is entitled to a fair wage for his work and a fair rent for his place. He is not permitted to arbitrarily increase prices or monopolize them, as this constitutes betrayal and unlawful appropriation of people's wealth.