Various masaail of Business and Dealings

Q: According to shariah, how should one's earnings/profits be divided? What fraction should be spent on ones family, charity, business, etc.?

Q: Is the provident fund halaal or not?

Q: If I round up figures when speaking, for example, if I bought something for $49 and someone asks me how much it was and I say $50, or if something is $950 and I say 1k (without the intention to decieve anyone), would that be considered lying and a major sin?

Q: If a person does not work hard, he only prays and remembers Allah always for the sake of getting sustenance and money. Can he do this with this intention that Allah will fulfill his needs by invisible help?

Q: Sometimes people extend their flats either by one or two extra rooms or balcony unofficially both in private or government setup like DDA flats. These extensions are done at mass level. Nobody is getting harm or any trouble due to this extension. Kindly tell me if this type of practice is allowed in Islam?

Q: If one runs a floristry business, are you allowed to sell to people intending to purchase for Valentine’s Day gifts although not celebrating Valentine’s Day personally but running specials to the public for Valentine’s Day?

Q: I want to ask that if this debit card is halaal which is charging 1.5 % fees on international transactions and they charge 23.44 Pakistani Rupees after exceeding the limit of atm withdrawal which is 3 within a month?

Q: On many websites when making an account for something or placing an order an option is necessary to be ticked that says, "Do you agree to the terms and conditions?" or "Have you read the terms and conditions?" These terms are always so long that nobody reads them, but we still tick as if we have. Won't this be counted as a sin?

Q: What is the condition of a business that remains open and trading at the time of Jummah. All Muslim staff leave for Salaah but the doors remain open.

Q: I am participating in a technical project at my university which will be funded by the project's team members equally. The money collected will be used to buy parts and equipment for the project. During the project's duration, the remaining money will be kept reserved for use in case a part breaks and needs replacement.

After the project is over, the parts used in the project and the money will be equally distributed to the team members.

The parts distributed will be used, and may be worn. On what basis can the parts be distributed to the team members? Should they be distributed based on their value when they were bought, or should we estimate their current market value?