Maci needs 10 blue pens, which cost 10 cents each, so 10 * 10 = 100 cents or $1.
Maci also needs 15 red pens, which cost twice the amount of a blue pen, so 2 * 10 = 20 cents each.
Therefore, 15 red pens cost 15 * 20 = 300 cents or $3.
In total, Maci spends $1 on blue pens and $3 on red pens, so she spends $1 + $3 = $4.
#### 4
The answer is: 4
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Maci is preparing for the upcoming school year and visits a store to purchase pens. She requires ten blue pens and fifteen red pens. The cost of a blue pen is ten cents each, while a red pen is priced at twice the amount of a blue pen. What is the total amount of money that Maci spends on purchasing the pens?

### Answer:
