Answer:
Step-by-step explanation:
The price of the item = $ 1.00
total revenue of the day = $ 667.10 - $ 100 ( where $ 100 is the initial amount present from the beginning) = $ 567.1
sales tax = 7 % = 0.07
let number of items sold = n, total amount sold that day = $ 1 n
total tax = 0.07 n
$ 567.1 = n + 0.07 n
n = $ 567.1 / (1.07) = 530 items