tara produces color cartridges for inkjet printers. suppose cartridges are sold to mail-order distributors for $12 each and that manufacturing and other costs are as follows: the variable distribution costs are for transportation to mail-order distributors. also assume the current monthly production and sales volume is 20,000 and monthly capacity is 25,000 units. if the sales price per unit increases by $2.00 and unit sales decrease by 2,000 units, tara's monthly profit would: