I have a long column that shows multiple values numeric and non-numeric. I want to select those non-numeric cells, which are numbers WITH letters (units) next to them, remove the letters, and subtract a value from that selected cell without touching other cells. For example, if the values of E1:E5 are 1.3kg, 3.2, 1.1kg, 1.5, 2.1kg respectively, I want to select E1,E3, and E5 and subtract 0.2 from those selected cells, so the new values will become 1.1, 3.2, 0.9, 1.5, 1.9.