Helmholtz resonator equation help? Anyone?

I had another acoustical consulting company GRACIOUSLY send me a "plug in formula" for an Excel spread sheet. Not knowing how Excel spread sheets function, it's a little greek to me. Here's what they sent me.

C4 (the internal depth inside box between back plate and front skin, inches)=(((78.5)*(POWER((B4/E4),2))/(D4+(0.8*B4)))*(POWER((200/A4),2)))

Where:

B4 = diameter of the hole you drill (inches)
E4 = center-to-center hole spacing pattern (inches)
A4 = target frequency in Hz
D4 = thickness of the front plywood skin (essentially the throat length of the drilled hole) (inches)

I'm told that the following traslation applies for the "POWER" thingy!...lol:

POWER(x,2) = x squared

POWER((x/y),3) = (x/y) cubed, etc, etc

K,here's the deal...when I plug either of these formula configurations in with the variables, and compare the charts in the MASTER HANDBOOK OF ACOUSTICS no less, I get completely wrong answers from what they have!!!!...double, doh!!! This has been nothing short of down right pissin' me off! (lol)
For instance, using the chart in F.Alton's Master Acoustics book, some of their chart examples bellow give:

Air Depth Hole Diam. Panel Diam Perf% Hole spacing Freq rez.
3.625" 1/8" 1/8" 1.25% .991" 248

3.625" 1/8" 1/4" 1.25% .991" 199

3.625" 1/4" 1/4" 1.25% 1.98" 199

If I plug in the variables in these equations, I DON'T GET THEIR ANSWERS! And this is supposed to be the MASTER HANDBOOK! Or maybe I'm just a mathematical numbskull!? Lol
Again, plese post to audiogon for all to see, if anyone has answers here.

I made up a nice spreadsheet and stuck it on my website.

http://www.dyacoustics.com/Links.html

I'm not sure what math you are using :), but I get the same answers as the book for the table.

It's the 420Hz in the text that I think is a typo. The same spreadsheet that matches all the values in the table comes up with 300 Hz, not 420.

Take a look, let me know what you think or if you have problems with the file. You need to have Excel to run it.

Careful with the formula they sent you. It is correct of course, but has been rearranged to solve for the air space depth instead of the frequency.

Let me know if you get my spreadsheet to work.

Here's a sample calculation (first line in the table).
hole size = 1/8" (0.125), spacing = 2.22, thickness = 1/8", depth = 3 5/8" (3.625)

using the square configuration:
perf % = 78.5*(0.125/2.22)^2 = 0.25%

t (effective hole length) = 0.125 + 0.8*0.125 = 0.225

f = 200*(0.25/(0.225*3.625))^0.5 = 110 Hz

Ok, it appears the 3rd collumn of examples down on their comparison chart, is ALL WRONG! Everything else seems to calculate out, using the formula, figuring for frequency of resonance.
Now all I have to do is plug in to figure for "airspace depth", and I should be good to go! We'll test it out.
Thx folks
Oh, and for the record, the Master Handbook of Acoustics 4th edition has some MISTAKES it appears, here and there. Happens...

Ok, it's official! It appears my mathematics has developed a sever case of rust! Either that, er I'm just not good. Probably the later (lol)
I can't seem to figure "backwards", trying to figure for "DEPTH", rather than from the forumula in the book, which figures from "frequency".
I'm trying to do this by hand first, so I can see it work.
Anyone want to confirm how to break down the forumla
F=200 x the square root of (P)/(D)x(T), so I can figure back for D? So, would it be D = (P)/(T)x((200/F)squared)?
I don't seem to be doing this right.
I really need to figure for depth, rather than from Frequency.
Thank you