Help with summing an grid with a single criteria. SUMIF or SUm(IF) or SUMPRODUCT?

Hi there,
I'm looking for a formula that will allow me to sum the number of options available in an array with a single criteria.

On the example sheet attached, I want to know the number of "ACC" styles that I am offering in the range c$4:i$8.
By using the filter on the "function" column, I know my answer is 5, but how can this be formulated into the yellow cells?

I have tried various versions of SUM, SUMIF and SUMPRODUCT without success and keep getting a #VALUE error.

Any help with be much appreciated!

Thank you!

Thank you so much for your help!
the =1 was the key to what I was missing.