Savings from overproduction: x per unit
The savings from overproducing n units is nx where X is the savings per unit.
Storage costs for d days -
The storage cost per day for n units is ny where y is the storage cost per unit
for d days then nyd
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Step-by-step reasoning:
Savings from overproduction:
The savings from overproducing
n
n units is
n
⋅
X
n⋅X, where
X
X is the savings per unit.
Storage costs for
d
d days:
The storage cost per day for
n
n units is
n
⋅
y
n⋅y.
For
d
d days, the total storage cost becomes
n
⋅
y
⋅
d
n⋅y⋅d.
Condition to find
d
d:
The storage costs exceed the savings when
n
⋅
y
⋅
d
>
n
⋅
X
n⋅y⋅d>n⋅X.
We want the maximum
d
d, so we solve for equality:
n
⋅
y
⋅
d
=
n
⋅
X
n⋅y⋅d=n⋅X
Simplifying:
d
=
X
y
d=
y
X
Ensuring feasibility:
Since
X
>
y
X>y, it is feasible to store the units for
d
=
X
y
d=
y
X
days without the storage costs exceeding the savings.
Final Answer:
The maximum number of days
n
n excess units can be stored before the storage costs exceed the savings is:
X
y
y
X