196501-487484 FOI Trading Standards

I’m getting in touch with an FOI request as I would like to receive information on the following questions for your local authority area, spanning the past 5 years in total up to the latest available data.
Under the Freedom of Information Act, I wish to request the following information: 
1.    How many instances of test purchasing vapes were carried out, to combat underage sales of vaping products?
2.    How many of these test purchases resulted in the sale of vapes/e-cigarette products to underage individuals?
3.    What is the £ cost of carrying out a single test purchase investigation?
Please present this data annually for each of the below periods:
1st January 2023 > 22nd November 2023 
1st January 2022 > 31st Dec 2022 
1st January 2021 > 31st Dec 2021 
1st January 2020 > 31st Dec 2020 
1st January 2019 > 31st Dec 2019 
If you could send the information over in a CSV or XLSX format, that would be ideal.
Please note: if you are unable to retrieve 5 years of data for the above-requested information within the available FOI cost limit, please reduce the number of years to the last 3 years, or as far back as possible, to the latest available date.