At a time when inflation is $6\%$ per year, an amount of $$100,000$ fifteen years from now is the same as how many of today's constant$-$value dollars?

A piece of heavy equipment can be purchased for $$85,000$ now or for an estimated $$130,000$ five years from now. At a real interest rate of $10\%$ per year and an inflation rate of $6\%$ per year, determine if the company should buy the equipment now or in five years with inflation considered.