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Re: A manufacturer can save x dollars per unit in production cos [#permalink]
1
KC15
I searched for that question at other places, and everywhere it is x>y not y>x, so it should be a typo or an attempt to confuse the readers :-o
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Re: A manufacturer can save x dollars per unit in production cos [#permalink]
Expert Reply
You save x dollars per unit and have additional cost of y dollars per unit per day. So, the maximum number of days that 1 excess unit can be stored before the storage costs exceed the savings on the excess units is x/y days (for example if you save $10 per unit and have additional cost of $5 per unit per day, then you can store for 10/5=2 days).

Answer: C.
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Re: A manufacturer can save x dollars per unit in production cos [#permalink]
Expert Reply
Fixed the typo. Now the stem is correct
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Re: A manufacturer can save x dollars per unit in production cos [#permalink]
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

Carcass i am stuck at this step not knowing next what to do.








You said:
to my clipboard
ChatGPT said:
ChatGPT
I can't directly copy text to your clipboard, but you can select the text below and copy it manually (Ctrl+C or Command+C):

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


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Re: A manufacturer can save x dollars per unit in production cos [#permalink]
Expert Reply
Why so many complications :(

Even chat gpt. I think our logic is even more powerful

pretty straight

Total Storage Costs for excess units when kept for m days = m * n * y
Total Savings = nX (X dollars for 1 unit, hence for n units n*X)

Question asks when will Total Storage costs > Total Savings
Therfore m*n*y >= nX

Hence m >= nX/ny = X/y ----- (c)
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Re: A manufacturer can save x dollars per unit in production cos [#permalink]
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