In today's world of uncertainty, when retail across the world is crying, it is important that cash flow of the business is preserved for long term sustainability. One of the best ways to do is to manage the inventory of the business, where maximum cash of the retailers is invested. We can effectively do this using OTB (open to Buy) management. OTBis a budget that can help retailers know how much they need to buy in order to manage their business effectively. With the help of this technique many retailers can save themselves from the situations of over stocking or under stocking. With the help of this course we aim to educate all retailers or people pursing their career in Retail planning as to how they can simply implement this Open to buy technique and how they can create self managed excel based rolling budgets without spending hundreds of thousand dollars on fancy tools. This course will provide step by step methodology to charter out OTB(open to buy plan) and manage merchandise optimally.