Solve the following LP problem to answer the next $5$ questions.

You have three types of clothing items:

T$-$Shirts $($$$10$ revenue$)$

Jeans $($$$25$ revenue$)$

Jackets $($$$50$ revenue$)$

You have the following resources:

$500$ yards of cotton

$300$ yards of denim

$200$ yards of leather

$1000$ hours of labor

Resource requirements per clothing item:

A T$-$shirt requires $1$ yard of cotton and $1$ hour of labor.

A pair of jeans requires $2$ yards of denim, $0\mathrm{.}5$ yards of cotton, and $2$ hours of labor.

A jacket requires $1$ yard of leather, $1$ yard of denim, and $5$ hours of labor.

Production constraints:

Produce at least $100$ of each item.

Produce no more than $400$ of any item.

Produce $1$ jeans for every $2$ T$-$shirts.

Question $1$

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Question text

How much more can we charge for the T$-$shirts without changing the final value?