Duplicating the Same VBA macro in the Same sheet

hello everybody i recently constructed a very useful VBA macro, and it is operational but however i want it to be operational 2 area's in 1 sheet and unfortunately i'v been unlucky solving it, could anyone plz lay down a suggestion ? here's the original macro

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aside from E and F i wanted the same equation but with H and I, what i ended up with is this

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it seems ( E - F ) and ( H -F ) need to be separated from each other, because whatever is added in E its sending info to column I

thanks in advance.