3. This must be the most common kind of work in Chile.
b.
Farming
Mining for minerals and precious metals (gold,
silver, copper)
Drilling for oil
C.

Of the options provided the most common kind of work is Option B. Farming. But more people are actually employed in the services sector in Chile.  

Explanation:

About 22% of Chileans are employed in manufacturing and approximately 9% are employed in the agriculture industry based on 2019 figures. Only about 2.6 percent of the population is employed in the mining sector, although this is a big part of the GDP of the Chilean economy. Chile does not have a lot of oil reserves relative to other countries, although there is some ranking it 60th in the world.  The services sector is a very broad generalization but most employment charts about Chile from the World Bank and other sources rank the services sector as the highest employer at 69%. Unemployment in Chile is very high, particularly among the youth and young adult population at almost 19 percent in 2020 in people aged 15 to 24 years old.

I believe that most store owners do calculations based on sales and also on the quality and quantity of products, this helps them to understand what to keep and the correct quantity so that nothing is wasted or at least to avoid maximum waste of goods.