Sum is a general operand. Sum if requires certain conditions to be met. For example - you could have a list of daily sales for a year. Sum will total all the figures to give an annual total. Sum if...
Put down beans and cross out cakeLet me see, oh dear meWhat a chore to undertakeMilk plus bread, oh my headAdd, subtract, then mulitplyTill you're overcomeThis is much too hard for meI can't do the...