I'm trying to summarize pieces depending on a value in another column.

Hello,

So i'm trying to make a report on how each style is selling (pieces) and how many of the ones are NOOS (Never out of stock) and Seasonal colours.
In column C is the full SKU of the product, For example our SKU's are built "101068" First 3 digits "101" is the style. The fourth digit is the size. And the last 2 digits is the colour.

In Column J i have the "database" of the styles we have. And in Column K i have the seasonal colours, and column L i have the NOOS-colours.


In Column M i have SUM.IF formula to summarize how many pieces one style has sold.
In Column N i want to summarize how many pieces of those in M is seasonal colours.

I'm not sure how to build up the document from here. I'm kinda stuck.
If someone could help me i would be very happy.

Thank you in advance for any help!