I wonder to know how much money did you invest for a "everyday" photoshoot. More precisely for each images you upload to the agencies...

You can simply make the calculation by dividing the total cost of your everyday photoshoot by the number of images you are uploading from it.

I'm not talking about the most expensive photoshoot in your life, but it will still be interesting to know and what exactly this photoshoot was for!!!

I'm trying to make this poll simple. The poll is in dollar and I know that things are different for each country. Just calculate approximatively and it will make the job. It could have some modification on the way, depending on the participation...

there are some images, that I invested 0$, and they are good sellers, and there are images that I invested 50$, and dont sell.

Mine is under $5 without man hours.  I don't really have a good way to calculate that, it varies so much.  But I can say I work roughly 30-40 hours per week and make a satisfactory income, plus I LOVE doing this and you can't put a price on that. 

are you talking me handing over cash or the 'technical' cost including depreciation and wear and tear of equipment, fuel, vehical costs, etc etc

I don't think it makes sense to speak about investment per image. I mean it could make sense for statistics; but it isn't realistic to count it reasonably precisely. For me there is a huge variation of cost - sometimes I walk a few meters from my house with my son (or even stay at home) and in that case the only cost is my time, and in that scenario it's not much of my time; sometimes I buy props, get some models, makeup artist, travel to a location and have a lunch/dinner in a restaurant - and that's another cost. Sometimes I drive to a location far away, but without any models - so it's just my time but quite a bit of it.

Another question is how to count the cost of equipment and accessories that I keep buying more or less regularly. Including equipment will have a great impact on my average cost.