[Question]: A married couple opened a savings account. The wife committed to saving $100 every week while the husband committed to saving $225 every month. After 4 months of savings, they decided to invest half of their money in buying stocks. Each share of stocks costs $50. How many shares of stocks can they buy?
[Answer]: The wife saves $100 / week x 4 weeks / month = $400 a month. Together, the wife and husband save $400 / month + $225 / month = $625 / month. In 4 months, their total savings is $625 / month x 4 months = $2500. They are going to invest $2500 / 2 = $1250. So, they can buy $1250 / $50 / share = 25 shares of stocks.
So the answer is 25.

[Question]: Trisha needed to buy some groceries for herself and her dog. She spent $17 on meat, $22 on chicken, $43 on all the veggies, $5 on the eggs, and finally $45 on her dog’s food. When she left the store, she had only $35 left. How much money did she bring with her at the beginning?
[Answer]: The total amount of money she spent is $17 + $22 + $43 + $5 + $45 = $132. Add this to the amount she had left over to find the amount of money she brought at the beginning: $132 + $35 = $167.
So the answer is 167.

[Question]: Harry's birthday was three weeks after the closing of the school. His three friends decided to contribute an equal amount of money to throw him a party. Harry added $30 to the contribution, making the total contribution three times as much as Harry contributed. Calculate the total amount of money that each of Harry's friends contributed.
[Answer]:
If the total contribution was three times as much as Harry contributed, and Harry contributed $30, the total contribution was 3 * $30 = $90. Since Harry contributed $30, his three friends together contributed $90 - $30 = $60. Since the three friends were contributing an equal amount, each friend contributed $60 / 3 = $20.
So the answer is 20.