Keeping Track of Costs

I guess I should start keeping a tally of what I'm spending on this garden, just to see whether it's even close to worthwhile monetarily speaking.
So here goes:

Hydroponics Set-Up
*Polystyrene Sheet: $9.63 + $1.09 tax
72 - 3" Net Pots: $26.64 1 - 6" Net Pot: $1.12
24 pack - 2" rockwool cubes: $6.58
10L - Hydroton Rocks: $8.79
Tax (from bettergrowHYDRO): $4.21

Garden
*4 bags - Supersoil compost: $23.08
*2 bags - potting soil: 9.94 Drip Equipment: $4.96
*Hooks: $3.95
*Bird Netting: $19.97
*Seed Starting Soil: $3.97
*Tax (from Home Depot): $6.52 Tax (from OSH): $.76 Plants/Seeds
*4 bags (8 each) - shallots: $3.96
*1 bag (2 starts) - rhubarb: $1.99
*6 bags (10 each) - strawberry starts: $11.92
Sweet Pea Seeds: $2.79
Snap Pea Seeds: $1.79
Snow Pea Seeds: $1.79 12
Tomato Plants: $61.55

*purchases were courtesy of Elliott's birthday/X-mas :)

Updated 4/7/11