how to stop a formula, for example Cell A 1 * Cell B 1, for 12 months, B 1 = 10, after 6 months B 1 became 12 but if i put 12 in B 1 then the first 6 months calculation will not be at 10 but at 12, how can it automatically be converted and do not calculate it
Solved by G. U. in 25 mins