The solution is 280 

Parentheses 

Exponents

Multiplication 

Division 

Adding

Subtraction 

 Above you is what you see in math and must do first, and In that order. And you remember it by saying Please, Excuse, My, Dear, Aunt, Sally. Now that is out of the way, it is time to get down to business.

First we have helmet =30 So before you start remember the sequel above.  All we have is adding and subtraction, so we must go accordingly. Add first.

30 + 30 - 30=30

Next we have quiver =50 So therefore 50 +50 + 30 (30 came from the helmet) =130  The sequel above still applies.

Now we have double Axe = 10 so this mean 50 quiver -10 (because the Axe is double) - 30 =10. Sequel still applies.

Now the last part. We have 30 helmets, 50 quiver, and one Axe = (?)  This bring us to 30 + 50 x 5 (There is only one Axe) The sequel above still applies again. So Multiplication comes first before adding 50 x 5 = 250 + 30 = 280 50 x 5 +30 =280

230.  

PEDMAS plus learn to count arrows.

230.

Helmet is 30, each arrow in a quiver is 10, and axes are 5.

30+40x5=30+200=230

65 is my answer

400

helmet = 30

arrows = 50 

helmet=30; brush?=50; double ax=10; single ax=5

30+50x5

okay. helmet = 30, quiver = 50, double axes = 10 (which means single axes =5).

From the image:

30 + 50 X 5

To make sure that order of operations are followed correctly, I am going to add parentheses. That would make the equation look like this:

30 + (50 x 5) = 30 +250 = 280

Answer is 400, assuming that half an ax is half the value of the double axes.