https://www.acmicpc.net/problem/26530
26530번: Shipping
The first line will contain a single integer n that indicates the number of data sets that follow. Each data set will start with a single integer x denoting how many items follow. The next x lines consist of a string, and integer, and a floating point numb
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if __name__ == '__main__':
n = int(input())
for _ in range(n):
x = int(input())
total_price = 0
for __ in range(x):
name, unit, price = input().split()
total_price += int(unit)*float(price)
print('$%.2f'%(total_price))
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