If you were to take a child who has FS points totalling 6 in every area of learning, you would possibly expect that child to be one of the 'Average' children who will go on to achieve Level 2B in the core subjects at the end of KS1. So that your SMT can show 2 levels progress across that Key Stage, you could suggest that the initial assessment could be just below 1C.You could reasonably extrapolate out for the all 9s to achieve a level 3 etc. Where there are differences in the number of FS points achieved in different areas,which is rather more likely, it is up to you - if for example, you believe that your child with all 9 FS points in Writing is no way going to be a level 3 writer, you can adjust the level downwards as it has been shown that lower scores in other areas like attitude / physical / creative etc have an effect. Similarly with the 'maths ' areas; there are those who say that all 4 are equal, others who will suggest that 'Calculating' and 'shape space and measure' are stronger indicators of likely achievement, so how do you start to determine what a childs FS score is to start with even before you attempt to translate to ABC? If your school says that F7 is 1C you can but agree, but you can suggest that other factors should be taken into account which should allow you to modify the levels as you feel appropriate with reference to other parts of the EYFSProfile and with luck this will not lead to the setting of unrealistic targets for either the teachers or the children.