Count number of blanks across several columns

Hi all, thanks for taking a look at this problem that's stumping me.

On the spreadsheet attached spreadsheet, there are two tabs - the 'Data' tab contains the table of raw data, where each row represents a Class # as displayed in column A, and then each following column displays data for each class.

In the 'Formulas' tab, I want to track the number of blanks that occurred in columns D:G of the 'Data' table for each class. Hopefully this will be clear by looking at the example, but if not, let me know.

Thank you!!!!

Thanks both for your help with this, but I was hoping to find a formula that could look up the corresponding row in the data tab if the actual row number changes. does that make sense?

Thanks to all of you for your help, but I'm going to continue to troubleshoot this. I wasn't clear enough in what I required, and my example was too simple I believe

FDibbins, thanks to your message, and my stubbornness, I'll throw this back out there with a new example that better illustrates my problem... See the attahced.

In the 'Missing Data' tab, I want to use the ID #s as a reference to find the corresponding row in the 'Data' tab, and in that row, count the number of blanks from column D to G.

Thanks to all of you for the great suggestions.

Jokes on me, I'm the crazy one my friend, you're totally right... IT just took me three more cups of coffee to realize it. Thank you!