polynomial coefficients using linest when there are #N/A in the Y data set

I have a data set with fixed X values and corresponding Y values that I can feed in via a formula. There is not necessarily a Y value for each X value. in the cells with no Y data point, a #N/A populates. I can create a scatter plot and fit a polynomial to the data on the chart and it produces the coefficients of the displayed equation. My problem is that I can not get the same coefficients using the linest formula unless I remove all of the data points where the Y values are #N/A. Obviously this is a solution, but each time i pass new Y data into the table it will populate differently, so I need to keep the X values locked in place and not delete them. It seems that if a chart can ignore the #N/A data then the formula might be able to do the same.

I attached the file with the problem for you to look at.