unsure of what "3d formula" to use

7 On the Year worksheet, enter a 3D formula in cell range C5:G19 to calculate the total items sold for each department. If you use the fill handle to copy the formulas, click the Auto Fill Options and choose Fill Without Formatting. 4.8 8 6.4 On the YearLinked worksheet, select cell A4 and create a linked consolidated summary based on position that links to the data to find the total number of items sold for each department each quarter. Reference cell range A4:H20 on the Q1, Q2, Q3, and Q4 worksheets. Use the labels in Top row and Left column. AutoFit columns A:l and then hide columns B:C. Select cell A4 type Item 7 On the Year worksheet, enter a 3D formula in cell range C5:G19 to calculate the total items sold for each department. If you use the fill handle to copy the formulas, click the Auto Fill Options and choose Fill Without Formatting. 4.8 8 6.4 On the YearLinked worksheet, select cell A4 and create a linked consolidated summary based on position that links to the data to find the total number of items sold for each department each quarter. Reference cell range A4:H20 on the Q1, Q2, Q3, and Q4 worksheets. Use the labels in Top row and Left column. AutoFit columns A:l and then hide columns B:C. Select cell A4 type Item