FIG. 1 is a front, left side, bottom perspective view of a calculator with letter opener and tape dispenser, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a rear elevational view thereof; and,

FIG. 8 is a front, left side, bottom perspective view thereof, shown in an alternate position of use.

The broken line showing in the drawings is included for the illustrative purposes only and forms no part of the claimed design.