sort macro. I want to sort all data above first blank line by column f largest to lowest

sort macro. I want to sort all data above first blank line by column f largest to lowest but the amount of rows above the first blank line will vary regularly hence i cannot set a fixed range to sort by. It should be pretty simple but I am struggling. I do not want to sort the data below the first blank line again this position will vary depending of the number of rows above the first blank line. Any help i would appreciate Please find a blank example attached.I think i should of save it as a macro enabled file. Sorry.