Business Mathematics and Payroll Formulas

A comprehensive set of flashcards covering payroll calculation formulas, business math ratios, and sequence mathematical models based on the lecture notes.

Commission

$$Total\,Sales \times Commission\,Rate$$

Piecework Earnings

$$Rate\,per\,Item \times Output\,Produced$$

Monthly Salary

$$Annual\,Salary \div 12$$

Weekly Salary

$$Annual\,Salary \div 52$$

Hourly wages

$$Hourly\,Rate \times Hours\,worked$$

Overtime Pay

$$Hourly\,Rate \times Overtime\,Factor \times Overtime\,Hours$$

Premium Pay

$$Daily\,Rate \times Premium\,Rate$$

Gross Pay

$Taxable\,Salary + Non-Taxable\,Salary$ or $Basic\,Salary + Overtime\,Pay + Bonuses + Commissions + Allowances$

Net Pay

$$Gross\,Pay - Gross\,Deductions$$

Net Taxable Income

$$Taxable\,Salary - Total\,Deductions$$

Gross Deductions

$$Total\,Deductions + Withholding\,Tax$$

Percentage change

$$\frac{New - Original}{Original} \times 100\%$$

Inflation Rate

$$\frac{Current\,CPI - Previous\,CPI}{Previous\,CPI} \times 100\%$$

Markup

$$Cost \times Markup\,Rate$$

Selling Price

$$Cost + Markup$$

Margin Rate

$$\frac{Markup}{Selling\,Price} \times 100\%$$

VAT Total Price

$$Base\,Price \times 1.12$$

Profit

$$Revenue - Expenses$$

Arithmetic Sequence Nth term

$$a_n = a_1 + (n - 1)d$$

Geometric Sequence nth term

$$a_n = ar^{n-1}$$

Arithmetic Series

$$S_n = \frac{n(a_1 + a_n)}{2}$$

Finite Geometric Series

$$S_n = \frac{a_1(1-r^n)}{1-r}$$

Geometric Series when r=1

$$S_n = na_1$$

PhilHealth Deduction

$$Basic\,Salary \times 2.5\%$$

Normal Day Pay Rate

$100\%$ or $1$

Rest Day Pay Rate

$130\%$ or $1.3$

Special Holiday examples

Chinese New Year, All Saints Day, and Christmas Eve

Special Holiday Pay Rate

$130\%$ or $1.3$

Regular Holiday examples

Christmas, New Year's Day, Independence Day, and Good Friday

Regular Holiday Pay Rate

$200\%$ or $2$

Sunday (Rest Day) + Christmas Rate

$260\%$ or $2.6$

Regular Holiday + Rest Day Rate

$300\%$ or $3$

Overtime (OT) Factor

$125\%$ or $1.25$

Holiday OT Factor

$130\%$ or $1.3$

Holiday Hourly Rate Formula

$$Holiday\,Hourly\,Rate \times 130\%$$