Artisan and his Dilemma

This time of the year calls for some celebration. As a variety of Lord Ganesh idols are being displayed across the city, the artisans are on demand. Some artisans are in a dilemma. They work with clay but due to the overwhelming demand, there is a shortage of clay. They come with a plan to keep balls of clay ready such that they could combine those balls to attain any required weight below a giv