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The matrix \( M = \begin{pmatrix} 10 & 15 \\ 12 & 20 \\ 8 & 18 \end{pmatrix} \) represents the number of glasses sold for two types of juice over three consecutive days:
- The first column represents the number of glasses of Mango Juice sold.
- The second column represents the number of glasses of Orange Juice sold.

The prices for the juices are:
- Mango Juice = Rp 10,000 per glass
- Orange Juice = Rp 12,000 per glass

To find the total revenue for three days, we multiply the number of glasses sold each day by the price per glass and then sum them up. Let's calculate the total revenue:

For each day:
1. Day 1: \( 10 \times 10,000 + 15 \times 12,000 \)
2. Day 2: \( 12 \times 10,000 + 20 \times 12,000 \)
3. Day 3: \( 8 \times 10,000 + 18 \times 12,000 \)

I'll now calculate the total revenue.The total revenue from the sales of both Mango Juice and Orange Juice over the three days is Rp 936,000.

Would you like more details or have any further questions?

Here are five related questions to expand on this:

1. How would the revenue change if the price of Mango Juice increased to Rp 12,000?
2. What would be the impact on total revenue if 20% more glasses of Orange Juice were sold each day?
3. How could you represent the total revenue calculation using matrix multiplication?
4. What would the total revenue be if the number of days increased to 5, following the same pattern of sales?
5. How would you calculate the average daily revenue from these sales?

**Tip:** Matrix multiplication can simplify operations like these, especially when dealing with multiple products and time periods.

Pak Budi ingin menghitung total pendapatan dari penjualan dua jenis minuman, Jus Mangga dan Jus Jeruk, selama tiga hari. Jumlah gelas yang terjual direpresentasikan oleh matriks. Berapakah total pendapatan dari penjualan kedua minuman tersebut selama tiga hari?

This problem demonstrates how to calculate the total revenue from the sales of two types of juices over three days using matrix multiplication. Each row of the matrix represents the number of glasses sold each day, and prices per glass are provided for Mango and Orange juice.

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