data;

param wage_rate := 4000;
param overtime_premium := 1.5;
param max_overtime := 0.25;
param start_inv := 50;
param end_inv := 50;
param output_rate := 10;
param start_work_force := 40;
param safety_stock  := 50;
param inv_unit_cost := 100;
param hiring_cost := 6000;
param firing_cost := 4000;

set periods := jan feb mar apr may jun jul aug sep oct nov dec
;

param demand :=
jan 300
feb 300
mar 350
apr 400
may 450
jun 500
jul 650
aug 600
sep 475
oct 475
nov 450
dec 450
;

