The formula substituted into the equation I = P(1 + t)^t - P is 730 = 180,000(1 + 0.08)^0.08 - 180,000
I = P(1 + t)^t - P
where,
I = $1,000 - $270
= $730
P = $180,000
r = 4%
t = 30 days to years
= 1/12
= 0.08333333333333 years
I = P(1 + t)^t - P
730 = 180,000(1 + 0.08)^0.08 - 180,000
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