The cash price of a refrigerator was $8000. Samantha wanted to buy the refrigerator but pay in installments. If she paid a deposit of $3000 and paid 30 equal monthly installments of $300 each, calculate how much money she would have saved by paying cash. Let's think first. Chain of thought:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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When Samantha paid $300 in 30 equal monthly installments, she paid a total of $9000. Since the higher purchase is a deposit plus the total monthly installments, Samatha paid $3000 + $9000 = $12000 for the refrigerator on higher purchase. If she would have bought the refrigerator on the cash prize, Samantha would have paid $12000 - to $8000 = $4000 less.
Therefore, the answer is 4000.