The Following Table Shows the Units of Calculators and Rice

The following table shows the units of calculators and rice produced by a laborer in a day in Japan and Korea. Table 20.3
-According to Table 20.3,what is the greatest amount Korea is willing to pay for 1 calculator?

A) 1 pound of rice
B) 5 pounds of rice
C) 2 pounds of rice
D) 2.5 pounds of rice
E) Half a pound of rice