Currently the firm is using a pure level strategy. It has $60$ workers who produce $1200$ units per quarter

each. The cost per unit is $$35\mathrm{.}00.$ The cost of holding $1$ unit per quarter is $$1\mathrm{.}50.$ Of the following

descriptions of the situation, what is true? The quarterly demand information is provided below.

Q$1$:$120,000$ units, Q$2$:$100,000$ units, Q$3$:$80,000$ units, Q$4$:$92,000$ units

a$.$ Throughout the year, no back orders occur

b$.$ During the first quarter, $22,000$ units were back ordered

c$.$ A backorder occurred only during $1$ quarter

d$.$ A backorder occurred only during $3$ quarter