Wedding invitation: cost breakdown

Since we are DIY all of our wedding paper goods, we invested quite a bit of money on the tools for printing/cutting/etc. Since we want creative control and as much personalization as possible, this is possibly a cheaper route to get the biggest bang for our bucks. It is by no mean the cheapest route, as most of the DIY brides will agree that doing your own invitation is not the cheapest. Here's the breakdown of the invitation costs to date:
Save the Date (45 cards):
Azalea metallic cardstock (12 sheets): $4.32
Opal metallic cardstock (12 sheets): $4.32
Yarn (1 roll): $1.00
Zot dots (45 dots): $1.00
Envelopes: $7.31
Stamps (30 stamps): $12.60
Wraparound labels (4 sheets of decorative paper): $1.00
Gocco screen (1): $2.50
Gocco bulb (2): $3.19
Pink ink (negligible): $.20
Total: $37.39
Cost per save the date: $0.83

Invitation (100 suites):
Envelopes for RSVP (55): $8.94
Envelopes - main (100): $25.00
Gocco screens (12 screens): $30.00
Gocco bulb (24 bulbs): $32.00
Azalea metallic cardstock (3 reams): $54.00
Pomegranate 12x12 paper(40 sheets): $40.00
Black metallic cardstock (1 ream): $18.00
Opal metallic cardstock (1 ream): $18.00
Papermart ribbons (5/8" pink roll-25% of a roll): $1.50
Stamps for sending invites (square invitation cost $.80/invite): $48.00
RSVP stamps ($.42 stamps - 55 stamps): $24.00
Wraparound labels (10 decorative sheets): $2.50
Double sided tape: $14.00
Eyelets (black): $6.50
Ink (3 tubes): $10.00
Total: $331.00
Total per invitation: $3.31

Total with Gocco purchase: $581.00
Total per invitation with Gocco purchase: $5.82

Programs (50):
Azalea metallic cardstock (25 sheets): $9.00
Regular cardstock paper (1 ream): $7.00
Ribbon (3/8" pink): $1.25
Gocco screen (1): $2.50
Gocco bulb (2): $3.20
Printing: $25.00
Total: $47.95
Total per program: $.96

Other investments:
Gocco: $250
Eyelet setter: $20
Corner rounder: $15
3 circle punchers: $45
1 utensil punch: $10
1 embossing gun: $30
Xyron sticker maker: $30
Various stamps: $50
Total: $420

Total to date: $838