Holiday costs on Excel

In I.C.T we have been trying to pretend book a proper holiday for the school, 36 people including 6 adults. We have been planning all the costs and information on Microsoft Excel. We have learnt that if you insert the right formula for the right box and the right information you won't have to change everything as it will do it for you. So now we know why Excel is so useful for business and we can now do it so much quicker. Our I.C.T teacher showed us lots of different ways and each one became more of a shortcut than the other.