Question

Could someone help me with number 22?

Answer 1

Okay.  It's a hexagon, which means it has 6 sides, right?

Each side is 52cm. So you have 6 x 52 cm in total.
6 x 52 = 312cm.

The frame stuff is $4.10 per metre. Labour is $15.25.
First, mulitply $4.10 by 3.12 (changed to metres).
4.10 x 3.12 = $12.79 for the total length required.

So, just add the labour charge of $15.25, and we get:
$12.79 + $25.25 = $38.04

Edited to correct the silly mistake I made.

Answer 2

So it's a hexagon so it is like this 52•6