$\backslash$table$[[,$A$,$B$],[1,4,],[2,7,],[3,$One,$],[4,12,],[5,20,],[6,$Forty,$],[7,17,],[8,15,],[9,20,],[10,$End,$],[11,,]]$

Using the pictured Excel spreadsheet excerpt, what will the formula $=$ COUNTA$($A:A$)$ return?

$\backslash$table$[[$VALUE$!],[10],[20],[7]]$