How long do you bake a frozen philsbury apple pie?

Here are the directions from the box of a Claim Jumpers Frozen Dutch Apple Pie found at Walmart: Conventional Oven/ Preheat Oven to 400 Degrees F, Remove Plastic Wrapper from Pie, Cover Cookie Sheet With Aluminum Foil & Place Frozen Pie On Cookie Sheet On Center Oven Rack, Bake Pie For 50 Minutes, Allow Crumb Bag to Thaw On Countertop While Pie Is Baking, Remove Pie from Oven On Cookie Sheet. Never Lift Pie Pan By Edges. Open Crumb Bag With Scissors and Place Crumb Size and Then Sprinkle Onto The Pie. Crumble The Crumb Topping While Still In The Bag to Your Desired Crumb Size and Then Sprinkle Onto The Pie. When Adding The Topping Begin By Placing All Crumbs In The Middle of The Pie and Using A Fork, Distribute Crumbs Evenly from The Middle Towards The Edge of The Pie. Let Pie Bake For An Additional 10-15 Minutes . The Crumb Topping Will Bake Rich Golden Brown. Remove Pie from The Oven and Let Cool. Pie Will Slice and Serve Most Easily When Cooled At Least 2 Hours. If the topping is already on the pie, I would suggest laying a round piece of foil over the top, allowing the crust to brown but protecting the topping for first 50 minutes. Make sure to have some rich vanilla ice cream handy, in case these directions don't produce a perfect pie : )