Variable expenses are those expenses that track directly with sales. If sales stop they stop. These are expenses like supplies used to support in the making of your product or doing your service. Such things as shipping cost for raw materials for your product or service. If you have no sales then you're not going to be purchasing materials so your shipping cost for those materials will stop as well. As an example, if you have a lawn mowing business and there are no lawns to mow, then you wouldn't be buying gasoline to travel to your lawn mowing site. These kinds of things are variable expenses. If you're producing a product, it would include supplies used to produce that product like sand paper, glue, finishing materials, cutting tools, etc.
Some of the questions a growth business plan might ask you are: _ Are you comfortable that the market wants and is willing to buy your product or service? _ Is your product or service priced so it is competitive in your market? _ What's different about your product or service? Why would a customer purchase it over someone else's? _ Is your market big enough to support your business? What about 15 years into the future? _ If you wanted a better lifestyle, what would your business need to do to give you that lifestyle? _ How much sales would your business need to generate to give you that income? _ How much sales would your business need to generate to give you the income you want 15 years into the future? _ What will be the cost of your labor and material? _ What will your expenses run? _ How much will it cost to overcome the capacity constraints that will occur as your business grows to meet your income requirements _ Will your profit give you the income you want in the future and at the same time maintain a healthy business for you as well?