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 missing value $A$ is:

A$.22$

B$.30$

C$.26$

D$.28$

$26$

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