I am looking to build an Excel table listing funds which breaks down each one by its sector weightings in the columns which are manually inputted. In the summative row in each cell at the bottom of the table is the formula:
C18 =SUM($B$2*C2,$B$3*C3,$B$4*C4,$B$5*C5,$B$6*C6,$B$7*C7,$B$8*C8,$B$9*C9,$B$10*C10,$B$11*C11,$B$12*C12,$B$13*C13,$B$14*C14,$B$15*C15,$B$16*C16,$B$17*C17)/$B$18
D18 =SUM($B$2*D2,$B$3*D3,$B$4*D4,$B$5*D5,$B$6*D6,$B$7*D7,$B$8*D8,$B$9*D9,$B$10*D10,$B$11*D11,$B$12*D12,$B$13*D13,$B$14*D14,$B$15*D15,$B$16*D16,$B$17*D17)/$B$18
E18 =SUM($B$2*E2,$B$3*E3,$B$4*E4,$B$5*E5,$B$6*E6,$B$7*E7,$B$8*E8,$B$9*E9,$B$10*E10,$B$11*E11,$B$12*E12,$B$13*E13,$B$14*E14,$B$15*E15,$B$16*E16,$B$17*E17)/$B$18
Etc...
A little knowledge is a dangerous thing! I know just enough to know there is a much better way to do it, but that's it. It would be ideal if the formula updated itself when additional rows are added to the table.