Hurricane Quarterstaff, how do you figure it's cost?

[ShadeOfRed]

I am pretty confused here...could use some help. I'm sure I'm just missing something probably...

Hurricane Quarterstaff - a +1/+1 quarterstaff, that once per day can cast gust of wind, DC 13 fort save negates. If you are a monk or ninja you can activate the gust of wind with a ki point.

It's full cost is 7,840gp.

Now a +1/+1 quarterstaff costs 4,000gp. Leaving 3,840gp left. Subtract masterwork to both ends, for the amount of 600gp, leave 3,240gp. How is this computed?

I'm getting 2nd level spell x 3rd level caster x 1,800gp = 10,800gp

In order to get 3,240 is 2nd level spell x 3rd level caster x 540gp...

I'm trying to make an item for one of my players and I can't figure out the formula. Is the one I show above the correct one for putting a spell on a weapon?

[Jason Nelson]

If the ability is usable less than 5/day, you divide the uses per day by five and multiple that times the 1800 use-activated multiplier.

If it is an additional ability after the first, or a spell ability added to a weapon or armor (which normally don't provide spell-type powers), the cost is increased by 50%.

So instead of 2nd x 3rd x 1800 = 10,800,

you get 2nd x 3rd x (1800/5 (which is 360) x 1.5 (which is 540)) = 3240

[ShadeOfRed]

Jason Nelson wrote:

If the ability is usable less than 5/day, you divide the uses per day by five and multiple that times the 1800 use-activated multiplier.

If it is an additional ability after the first, or a spell ability added to a weapon or armor (which normally don't provide spell-type powers), the cost is increased by 50%.

So instead of 2nd x 3rd x 1800 = 10,800,

you get 2nd x 3rd x (1800/5 (which is 360) x 1.5 (which is 540)) = 3240

Thank you very much. Sometimes the rules get pretty convoluted and I miss things. Thank you again!

[Jason Nelson]

Happy to help.