A few things you might want to ask yourself before you pack in the day job to build your startup.
* Who are my customers?
* What are they buying from me?
* How much will they pay? How much will it cost me to supply them and how many might buy?
* Why will they buy from me and not someone else?
If you can't answer WWHW in 1 minute perhaps you should re-evaluate your business model.
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