Sync OUr website stock etc with supliers

HI, I need to get help with following. 1. We will put in quantity of availbe products at oru our own stock example 20 pieaces that we have in our main stock and then the system show to customers 1-3 days delivery and when the quantity iwill go down to zero "0" then I want he system to look /sync automaticly is the suppliers has the current prodcuts using the articlenumber and is not in stock at suplier I want it to be showed at our website 10-14 days delivery. If there is stock at supplier shos 5-7 days delviery. Also I need a a box where I can put example 50% more price on supplier price and them all the products whosed depending categorie changes automaticly to that price to be shoed to [login to view URL] this can be activated and disabled so we can manually soemtimes change price as we want. ALso there wil be needed a sync to a box in admin the current supplier price we buy the products for. ALso last if we make misstake to manually put in price that is lower that the price that we buy in from supplier there will be error message. We use today opencart software. Best regards, Jukka Sorsa.