I went into Petco to buy the Frontline & they wanted $58 a box
I asked the cashier if that price was right & she said yes...I told her I just got off their online store & it was $40 ..she said that was because they don't have to pay store fees,cashiers, stock etc.,etc..... I go down to Pet Supplies Plus & it's $42.....Petco seems a bit high on there things...