Gather data on industry KPIs

I need to collect several industry KPIs for the retail sector in the US via web research. Specifically the following data would be necessary. Ideally we'd need this data for the "Electronics & Appliances" (e.g. Best Buy), "Groceries" and "Big Box" (e.g. Home Depot). Data should for the sector on average and for the following companies: Best Buy, Walmart, Home Depot, Costco. Sources (e.g. Links) to be provided together with excel spreadsheet with the results. Foot traffic (number of customers entering the stores per day or per month) Conversion rate (number of visitors that ultimately buy something) Churn or retention rate (number of customers that stop buying) Visit frequency (how many times per month or year customers visit the stores) Cost of acquisition (cost of acquiring new customers) Sales (annual sales 2018) employee (number of employees) Store area (total store area) Average transaction volume (average value of purchases on a store) Average unavailability/visit (product unavailability as a % of actual purchase) Gross margin Operating margin Labor cost Shrinkage