## Task 2 - 090522

In an HO clothing store, three customers bought the same fabric. The first bought exactly $3 \mathrm{~m}$, the second exactly $5 \mathrm{~m}$, and the third exactly $9 \mathrm{~m}$. The second customer paid $30 \mathrm{M}$ more than the first.

How many Marks did the three customers have to pay in total for the fabric?
The second customer bought exactly $2 \mathrm{~m}$ more fabric than the first; because $5 \mathrm{~m} - 3 \mathrm{~m} = 2 \mathrm{~m}$. For these $2 \mathrm{~m}$ of fabric, he had to pay $30 \mathrm{M}$.

Each meter of fabric therefore cost half of that, which is $15 \mathrm{M}$. The three customers together bought $17 \mathrm{~m}$ of fabric; consequently, they had to pay a total of $17 \cdot 15 = 255 \mathrm{M}$.