Each coffee table produced by Timothy Kent Designers nets the firm a profit of $$9.$ Each bookcase yields a $$12$ profit. Kent's firm is small and its resources limited$.$ During any given production period $($of $1$ week$),10$ gallons of varnish and $12$ lengths of high quality redwood are available. Each coffee table requires approximately $1$ gallon of varnish and $1$ length of redwood. Each bookcase takes $1$ gallon of varnish and $2$ lengths of wood.

$T=$ number of tables produced each week and $B=$ number of bookcases produced each week.

Referring to Exhibit $8-3,$ suppose that this problem requires that you use all the varnish for the week. How would the LP constraint change?

$1B+1T10$ will become $1B+1T=10$

$1B+1T10$ will become $1B+1T10$

$1B+1T10$ will become $1B+1T12$

$2B+1T12$ will become $2B+1T=12$