Potential first trailer job, pricing question,

[Graphic Content 2]

Hi again,
  I hope you are all well and in good spirits.
  I am quoting a trailer job, new trailer nothing to remove. I would like some input on my pricing if you don't mind.
  The signage would be on each side 60" x 50" and the front 43" x 38"
Then an American flag which I make and "Veteran Owned and Operated" under that measuring roughly 15" x 22" total, on 2 sides
Mostly text with a few clip art graphics.
No layering of colors or intricate cuts.
  Below is a breakdown using the suggested formula I found on here.
Black - 164" by 30" = 194/2 = 97
Blue   - 176" by 15" = 176/2 = 88
Red    - 204" by 17" = 204/2 = 102
White -   44" by 15"  =  59/2 = 29.5

Total $316.50

Labor 5 hrs @ $40 per = $200
(will probably take me more since this is my first trailer and those rivets will tie up time)

$516.50

  He also wants a couple door magnets which I have 2 of 12" x 24". Smaller version of the signage but less busy.
I was thinking $20 each on those and just round the quote out to $550.00

I know he talked to the only other shop in town and they do mostly wraps. His wife said the guy was really expensive so I figure I have a good shot at my first real gig. But I also don't want to be so cheap he thinks I don't know what I am doing and goes to the big guy if that makes sense.
Thanks for any input, advice, or corrections on how I came up with the numbers.

[slice&dice 2,450]

You'll need to buy CAST vinyl, which is much higher cost than the regular stuff.

Going over rivets with calendared vinyl is not recommended.

And use the soft squeegee around the rivets --- 1/2-rounded felt squeegee.

 

[Graphic Content 2]

Thanks for the heads up slice&dice. The guy is just starting out and is trying to cut costs where he can so I was looking at 651. I'm glad you said I needed cast or I would have looked like the newb I am. And I am not trying to peel and redo anything for free.

I'll also grab that squeegee while I'm shopping. I was looking at the torch and tennis ball method but was buying a rivet brush too.

Thanks again for the input, much appreciated.

 

[Go-C Graphics 856]

Personally,  I prefer to remove the rivets and reinstall them over the vinyl.