subtotaling groups of data broken apart my inserted lines

I need a piece of code that will subtotal numerical data found in columns H:S and that is broken apart into groups as you move down the worksheet by two inserted lines.

I have broken apart the data with two lines so that when columns H:S is subtotaled, there will still be a row separating each individual group of data.

There might be as many as 30-50 groups of data in the worksheet.

Non numerical data is stored in columns A:G.