3) Rent and Pro Rata Share of Expenses I have a tenant that will pay rent of $3,800 per month for a space that offers to the tenant a total of 4,000 square feet of rentable space.My building offers 28,500 total square feet of rentable space.Annual operating expenses for the building are $145,000, including taxes and insurance.The lease is a triple net lease.In annual rent per square foot terms, what is the base rent that this tenant is paying to me?In monthly terms, what will this tenant be paying for operating expenses in addition to the rent obligations?