Need help with this question and please no links... “Lee currently spends $3.25 a day on coffee and $6.99 on lunch. He wants to create a food budget to save money, so he buys a coffee maker for $22.00 to make his own coffee. He also begins spending an average of $3.75 a day to buy food to make his lunch. With his new budget, how much money does Lee save at the end of 30 days”

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?