Macros to add up Bold Numbers Only

I'm using Office 365. I would like to know how to add up just the "Bold Numbers Only" based on which cell the "Total Cost" lands. "Total Cost" will always be in column "D", but it will not always land in the same row. All of my Totals land in column "G" and come in correctly and total up correctly each time, but the "Total Cost" does not, so I'm just looking for a macros just to handle the "Total Cost". I will create a control button for this action. See attached for a better under standing. I appreciate any help I can get for this.

Thanks for the quick answer on this. Yes I could use =SUM(G1:G83)/2, but it does not always land between G1:G3, this is why I was looking for a macros that would pickup the bold numbers in column "G" based on where "Total Cost lands in column "D". I also changed the order for my totals and got the same results.

I'm using Office 365. I would like to know how to add up just the "Bold Numbers Only" based on which cell the "Total Cost" lands. "Total Cost" will always be in column "D", but can land anywhere between D31:D209. All of my Totals land in column "G" and come in correctly and subtotal up correctly each time, but the "Total Cost" does not, so I'm just looking for a macros just to handle the "Total Cost". I will create a control button for this action. See attached for a better under standing. I appreciate any help I can get for this.

Can you please send it to me as an example in an excel sheet. Thank you

How can I add this =SUMIF(D32:D209,"SubTotal*",G32:G209) to a macros button?