我遇到了这个错误语法错误，我无法在不破坏它的情况下找出任何其他解决方案[关闭]

Question

我遇到了这个错误语法错误，我无法在不破坏它的情况下找出任何其他解决方案

#function for calculating revenue
def revenue(x):
    return 0.05x+2.5

#function for calculating cost 
def cost(x):
    return 0.03x

#opening the txt file in read mode which contains the sales data
sales = open("data.txt", "r") ;

total_revenue=0;
total_cost=0;

#reading the sales data line by line 
for x in sales:
    #calculating total revenue
    total_revenue+=revenue(int(x))
    #calculating total cost
    total_cost+=cost(int(x))

#calculating profit 
profit=total_revenue-total_cost
#printing the profit
print(profit)
#closing the sales file
sales.close() 

输出应该是：-

（基础）aky03@Ajits-MacBook-Air 100ct % python main.py

40.7 但它不工作

Answer 1

return 0.05x+2.5 -> return 0.05 * x + 2.5

return 0.03x -> return 0.03 * x

同时删除;