Please show all the equations and the variables.

A new project will cost $80,000 initially and will last for 7 years, at which time its salvage value will be $2,500. Annual revenues are anticipated to be $15,000 per year. For a MARR of 12%/yr, plot a sensitivity graph for annual worth versus initial cost, annual revenue, and salvage value, varying only one parameter at a time, each within the range of +/-50%