When putting together a Weighted$-$Point Evaluation System, a company put together the following list of weights:

Safety $=0\mathrm{.}29$

Sustainability $=0\mathrm{.}32$

Quality $=0\mathrm{.}02$

Delivery $=0\mathrm{.}12$

Cost $=?$

What should be the weight for "Cost" for this to be a valid Weighting Scheme?

$0\mathrm{.}000223$

$0\mathrm{.}25$

$0\mathrm{.}75$

$0\mathrm{.}19$

$0\mathrm{.}32$