Khamsah Mining Company has purchased a tract of mineral land for $900 090 . It is ethat this tract will yield 120 090 tons of are with sufficient mineral content to make itprocessing profitable , It is further estimated that 6 090 tons of are will be mined thelast year and 12 000 tons every year in between . ( Assume 1 1 years of mining operatiand will have a salvage value of $30 090