Let's break down the problem:

• You are saving ₱290 each week.
• In the 4th week, your father gave you an additional ₱575 on top of your savings.

Now, let's calculate your total savings:

1. For the first 3 weeks, you save ₱290 per week:

   • Savings after 3 weeks: $290 \times 3 = ₱870$

2. In the 4th week, you save ₱290 again and receive an extra ₱575 from your father:

   • Total savings for the 4th week: $290 + 575 = ₱865$

3. Add all of this together:

   • Total savings so far: $870 + 865 = ₱1,735$

So, after 4 weeks, your total savings is ₱1,735.

Would you like more details or further explanation?

Here are 5 related questions for further practice:

1. If you continue saving for 8 weeks, how much will you have saved by then?
2. What is your total savings after 6 weeks if no extra money is added?
3. If you save ₱290 weekly and spend ₱100 per week, how much will you have saved after 5 weeks?
4. If your savings goal is ₱5,000, how many weeks will it take to reach this goal with no additional money?
5. If you save ₱400 per week instead of ₱290, what would your savings be after 4 weeks, including the extra money from your father?

Tip: Keeping track of irregular additional amounts in savings can help you reach your goals faster!