How much work is done when a 105 g tomato is lifted 16.3 m?

Work is measured in Joules. 1 Joule is the amount of work performed when 1 Newton of force is exerted over a distance of 1 meter.

So let's look at your numbers. How much force does gravity exert on a 105 g tomato?
F = MA = 0.105 kg * 9.81 m/s² = 1.03 kg-m/s² = 01.03 N.

So to lift the tomato, we need to apply 1.03 N of force, and we apply that force over a distance of 16.3 m. Total amount of work done will be
1.03 N * 16.3 m = 16.8 Joules.

E = mgh

If m is in kg, g is in m/s^2 and h is in m, then E will be in Joules.