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The problem asks how many locations have a total monthly rental cost for a 10m² Standard office and a 10m² Premium office below IDR 27,000,000 (with 20 working days per month).

### Steps to solve:

1. **Convert daily rental prices to monthly**:  
   For each location, calculate the total cost of renting both the Standard and Premium offices for 20 days.
   
   Formula:
   \[
   \text{Monthly cost} = (\text{Standard price/day} + \text{Premium price/day}) \times 20
   \]
   
2. **Check the total monthly cost for each location**:  
   The total for each location should be compared to IDR 27,000,000 to determine if it falls below this amount.

### Given Data:
- **Medan**: Standard: Rp. 350,000/day, Premium: Rp. 450,000/day  
   Monthly cost = \((350,000 + 450,000) \times 20 = 800,000 \times 20 = 16,000,000\)
   
- **Makassar**: Standard: Rp. 325,000/day, Premium: Rp. 420,000/day  
   Monthly cost = \((325,000 + 420,000) \times 20 = 745,000 \times 20 = 14,900,000\)
   
- **Manila**: Standard: 1,660 PHP/day, Premium: 2,182 PHP/day (conversion: 1 PHP = Rp 300)  
   Monthly cost = \((1,660 \times 300) + (2,182 \times 300) \times 20 = 498,000 + 654,600 \times 20 = 1,152,600 \times 20 = 23,052,000\)

- **Singapore**: Standard: 75 SGD/day, Premium: 95 SGD/day (conversion: 1 SGD = Rp 10,000)  
   Monthly cost = \((75 \times 10,000) + (95 \times 10,000) \times 20 = 750,000 + 950,000 \times 20 = 1,700,000 \times 20 = 34,000,000\)

- **Jakarta Barat**: Standard: Rp. 610,000/day, Premium: Rp. 760,000/day  
   Monthly cost = \((610,000 + 760,000) \times 20 = 1,370,000 \times 20 = 27,400,000\)
   
- **Jakarta Pusat**: Standard: Rp. 650,000/day, Premium: Rp. 760,000/day  
   Monthly cost = \((650,000 + 760,000) \times 20 = 1,410,000 \times 20 = 28,200,000\)

### Locations below Rp. 27,000,000/month:
1. Medan: Rp. 16,000,000  
2. Makassar: Rp. 14,900,000  
3. Manila: Rp. 23,052,000  

So, **3 locations** have a total monthly cost below Rp. 27,000,000.

The answer is **C. 3**.

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Would you like a more detailed explanation, or do you have any questions about the solution?

Here are 5 related questions to expand your understanding:
1. How does currency conversion affect rental costs?
2. What factors influence office rental prices in different regions?
3. How would the calculation change if the number of working days varied?
4. How do service charges or additional fees impact the overall monthly costs?
5. What are the implications of choosing a Premium office over a Standard office?

**Tip:** Always remember to account for currency conversions when comparing international costs!

Berapa banyak lokasi kantor tersebut di atas yang nilai total sewa per bulan untuk 1 lokasi: 10m2 kantor Standar dan 1 lokasi: 10 m2 kantor Premium, nilainya dibawah Rp. 27.000.000,- (dengan asumsi hari kerja 20 hari per bulan)?

This problem involves calculating the total monthly rental cost for a Standard and Premium office (10 m² each) across different locations. Using daily rental prices and working days per month (20), the goal is to determine how many locations have costs below Rp. 27,000,000. Includes currency conversions for international locations.

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