Mix the spices and oil in a small bowl. Peel the sweet potato. Wash the potatoes and dry well. Slice the potatoes and sweet potatoes into oven fries, wedges or cubes. Put into a large bowl. Put potatoes onto a cookie sheet. Drizzle oil and spice mix onto potato pieces. Toss the potatoes until evenly coated. Bake in a 375 oven for about 45 minutes, or until potatoes test done with a knife, turning over every 15 minutes.