Sam and Rono bought similar radio cassettes from the same shop Sam bought her's for cash. Rono bought his on hire purchase terms by paying a deposit of $ 4,000 plus 6 equal monthly installments of $3,000 each. If Rono paid $ 5,000 more than Sam, how much did Sam pay for the radio cassette?

Rono:

Cost = 4000 + 6*3000 = $22,000

Sam:
Cost = 22000 - 5000 =