I assume the 2250 is your price? Well you need 1.8m3 of Concrete. But what are you pouring it on, Just ground? You will need a base of some stone firstly and need to dig down say 6 to get a good base. You will also need a plate compactor/whacker plate. Tampers to level the concrete. Contact a few labourers, Concrete plants and stone plant to see their rates and prices for materials and labour.