Refer to the incomplete grouped frequency below.

$\backslash$table$[[\backslash$table$[[$Classes$],[($Price$)],[($$$)]],\backslash$table$[[$Frequency$,],[$f$]],\backslash$table$[[$Cumulative$],[$Frequency$]],\backslash$table$[[$Midpoint$,],[$m$]],$fm$,$fm$^(2)],[\backslash$tabletabletableA$,43,55\mathrm{.}00,1540,84700],[\backslash$tableSigma $,60,-,-,,]]$

The value of $fm$ is:

A$.3820$

B$.4280$

C$.3480$

D$.3280$