From The Image above shown I want some plugins, extensions, or codes of lines for chrome inspect element. I want to add the previious reading with +75 in new reading. Say foe eg in SL. NO 3 …Previous reading is 3052 and i want to add +73 and make it 3125 and fill in the Textbox automatically with chrome extension, codes, plugins without me using manual calculator and manual addition to fill the Text box.