William Beville’s computer training school, in Richmond, stocks workbooks with the following characteristics:
Demand D = 19,700 units/year
Ordering cost S = $24/order
Holding cost H = $3/unit/year
a) Calculate the EOQ for the workbooks.
b) What are the annual holding costs for the workbooks?
c) What are the annual ordering costs?

answer; i believe its aptitude;

the answer is d. splog

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.

it most likely is charging, however when using a hot spot, it drains straight through battery life.