如何在代码中使用带数组的数组函数

The below is an extract from some code I have produced to automate some of the processes in my job. One element of the macro I produced is to remove any grades out of scope of my report. Since the out of scope grades are always changing, but the in scope grades are set, I decided to try and use an array. I have never used these before and I found some code online to use as a template, the problem is that the code seems to flag all grades as 'false' whether they are in the array or not. I have checked the range and column by changing delete to setting interior colour and this confirms the column and range is correct. I think the issue is that I have not properly linked the function with the code in the sub. Any advice or suggestions will be appreciated:The below is an extract from some code I have p