To calculate the total for the entire range of cells in the "Cost" column, the correct formula is A. =SUM(D2:D7).
The SUM() function in Excel is used to add a range of numbers. In this case, we want to add all the values in the "Cost" column, which is represented by the range of cells D2 to D7.
So, The formula =SUM(D2:D7) instructs Excel to add all the values from cells D2 to D7, which are the cells that contain the numbers in the "Cost" column.This formula instructs Excel to add all the values from cells D2 to D7, which represent the "Cost" values in the table.