A businessperson is planning to setup a new mobile accessory shop. They will sell only

one type of luxury customized mobile phone cover for $$100$ each. The store will have a

salesperson whose salary will be $$2000/$month$.$ The luxury cover is built with premium

grade aluminium and rubber which costs $$25$ for each cover. Assuming there is no other

cost for the store, how many phone covers does the business need to sell to avoid

having a loss each month