I am converting my mother's recipes in a book for our family. The recipe calls for a 10 cent package of instant potatoes and biscuit mix. does anyone have any idea of what that would equal out to be. Not sure how old the recipe is. My mother passed in 2000 and she collected recipes for years. 
The R.T. French Co. (French's) introduced instant potatoes in America in the early 1950's. From early ads, the boxes in the 50's & 60's contained either 8 or 10 servings. A serving is probably the same as later years, which would be 1/4 cup dry or 1/2 cup prepared.  Biscuit mix has been around since around 1930.   If the recipe has both instant mashed potatoes and biscuit mix, it would have to be from the 1950's or later. Because of the 10¢ reference, it was more than likely the 50's.  During this time frame, it was most likely the 8 or 10 serving box of mashed potatoes, 2 - 2.5 cups dry. Jiffy baking mixes in 8 oz boxes sold for 10¢ in the mid to late 1950's. 