Bramble's World Toy Shop is an on-line toy store specializing in hand-made stuffed animals. Bramble's World sold 4000 Donny the Dragon stuffed toys during April and 6000 during May, Shipping costs for the two months were $12000 and $17200 respectively. Using these two months' data, the shipping cost function is best estimated as {$0.50 x number of toys sold) + $10000 (53.00 x number of toys sold) $2920. 1$2.00x number of toys sold) + $70000 (52.60 x number of toys sold) + $1600