Common using KPI Formulas

Hello Fellow Powerbians,

I am just wondering is there any place or a book that can have the most common using KPI's with their formulas. So, I can practice with them.

I found the list of different KPI's as per their domain. But, I don't have enough luck to get the formulas?

Here are few KPI list as per their domain

Examples of Sales KPIs

Number of New Contracts Signed Per Period
Dollar Value for New Contracts Signed Per Period
Number of Engaged Qualified Leads in Sales Funnel
Hours of Resources Spent on Sales Follow Up
Average Time for Conversion
Net Sales – Dollar or Percentage Growth

Examples of Financial KPIs

Growth in Revenue
Net Profit Margin
Gross Profit Margin
Operational Cash Flow
Current Accounts Receivables
Inventory Turnover
EBITDA

Examples of Customer KPIs

Number of Customers Retained
Percentage of Market Share
Net Promotor Score
Average Ticket/Support Resolution Time

Examples of Operational KPIs

Order Fulfillment Time
Time to Market
Employee Satisfaction Rating
Employee Churn Rate

Examples of Marketing KPIs

Monthly Website Traffic
Number of Qualified Leads
Conversion Rate for Call-To-Action Content
Keywords in Top 10 Search Engine Results
Blog Articles Published This Month
E-Books Published This Month