A bank has two sites at which checks are processed. Site $1$ can process $10,000$ checks per

day and site $2$ can process $6,000$ checks per day. The bank processes three types of checks:

vendor, salary and personal. The processing cost of each check depends on both the type and

the site. Each day, $5,000$ checks of each type must be processed.

Cost $($$$)$ Site

Check type $12$

Vendor $0\mathrm{.}050\mathrm{.}03$

Salary $0\mathrm{.}040\mathrm{.}04$

Personal $0\mathrm{.}020\mathrm{.}05$

Formulate a LP model with minimized the check processing cost. Solve it by Excel Solver.

$[50$ points$]$