The ornamental design for a base of a foodslicer, as shown and described.
FIG. 1 is a left side and top perspective view of the base of a food slicer at the angle of operation with the folding feet and tightening knobs in phantom, showing our new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines are for illustrative purposes only and form no part of the claimed design.