2 When worksheets are grouped, what you do to one worksheet happens to the other worksheets in the group. Group the Valley through Mills worksheets. Create a formula in cells D5:D15 to calculate the total charges for each instrument. 3 With the worksheets still grouped, format cells C5:D16 with the Accounting Number Format with no decimals. 4 Entering formulas into grouped worksheets is a very efficient way to simultaneously create new data in multiple worksheets and is the same as entering data in grouped worksheets. In cells B16 and D16, with the worksheets still grouped, calculate the total number of students and total charges for the school. Ungroup the worksheets. 5 3-D references allow formulas and functions to use data from cells and cell ranges across worksheets. On the Summary worksheet, enter a 3-D SUM function in cells RA.R16 to paleuilato the total studante for all four ehnAle