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The text in the image is a word problem in Japanese that involves calculating sales increases over several months. Here's the translation and breakdown of the problem:

**Translation:**
At this company, the sales target for May was set as a 10% increase over the sales amount for April. In June, the sales increased by 10% over May, and in July, they increased by 10% over June. The sales for July ended up being 133.1 billion yen. What was the sales amount for April?

### Let's break this down:

- Let the sales amount for April be \( x \) yen.
- May sales = \( x \times 1.1 \) (a 10% increase over April)
- June sales = \( (x \times 1.1) \times 1.1 = x \times 1.1^2 \) (a 10% increase over May)
- July sales = \( (x \times 1.1^2) \times 1.1 = x \times 1.1^3 \) (a 10% increase over June)

We are told that July's sales were 133.1 billion yen. So, we can set up the equation:

\[
x \times 1.1^3 = 133.1
\]

Now we can solve for \( x \), the sales amount for April.

I'll calculate this next.The sales amount for April was approximately **100 billion yen**.

Would you like any further details or clarifications?

Here are some follow-up questions you might find interesting:
1. How much was the sales increase from April to May in absolute terms?
2. What was the sales amount for May?
3. How much was the sales increase from May to June in absolute terms?
4. What was the sales amount for June?
5. What percentage increase from April to July did the company experience overall?

**Tip:** When solving percentage-based problems, carefully account for how compounding affects the total increase over multiple time periods.

At this company, the sales target for May was set as a 10% increase over April's sales. June's sales increased by 10% over May, and July's sales increased by 10% over June. July's sales were 133.1 billion yen. What was the sales amount for April?

Calculate the sales amount for April using percentage increases for May, June, and July. Given that July's sales were 133.1 billion yen, this problem involves using percentage growth formulas and solving for the April amount.

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