1. Section 1

1.18. Explore 2

Mathematics 20-3 Module 1

Section 1: Personal Budgets

 

A man helps a girl with her studies.

George Doyle/Stockbyte/Thinkstock

Next, you will create a budget based on several months of expense and income information. This will be a conservative budget. The budget will be designed so that at the end of each month there will be a surplus, or money left over. A conservative budget is set up to avoid running into a deficit and to ensure there is enough income to cover any unforseen month-end expenses.

 

Example

 

Marcel works as a clerk in a hardware store during the day. In the evenings, he supplements his income by tutoring young students in mathematics. Marcel would like to save money each month for a proposed trip to Europe next year. Marcel has reviewed his income and expenses for the past six months. Help Marcel create a conservative budget to achieve his goal.

 

The following chart summarizes Marcel’s income and expenses for the last six months.

 

Marcel’s Income and Expenses

Income

 

Expenses

 

 

Income

 

Expenses

 

January

 

April

Regular

$2210

Rent

$600

 

Regular

$2210

Rent

$600

Tutoring

$200

Food

$285

 

Tutoring

$190

Food

$345

 

 

Vehicle

$300

 

 

 

Vehicle

$410

 

 

Insurance

$200

 

 

 

Insurance

$200

 

 

Clothing

$125

 

 

 

Clothing

$210

 

 

Entertainment

$230

 

 

 

Entertainment

$290

 

 

Other

$300

 

 

 

Other

$340

February

 

May

Regular

$2210

Rent

$600

 

Regular

$2210

Rent

$600

Tutoring

$150

Food

$310

 

Tutoring

$230

Food

$295

 

 

Vehicle

$420

 

 

 

Vehicle

$420

 

 

Insurance

$200

 

 

 

Insurance

$200

 

 

Clothing

$250

 

 

 

Clothing

$75

 

 

Entertainment

$170

 

 

 

Entertainment

$280

 

 

Other

$250

 

 

 

Other

$355

March

 

June

Regular

$2210

Rent

$600

 

Regular

$2210

Rent

$600

Tutoring

$180

Food

$318

 

Tutoring

$325

Food

$328

 

 

Vehicle

$350

 

 

 

Vehicle

$395

 

 

Insurance

$200

 

 

 

Insurance

$200

 

 

Clothing

$300

 

 

 

Clothing

$125

 

 

Entertainment

$340

 

 

 

Entertainment

$240

 

 

Other

$290

 

 

 

Other

$345

 

Step 1: Estimate Marcel’s monthly income.

 

Marcel’s income from tutoring varies from month to month. Use a monthly average of his income from tutoring.

 

Add all the income he receives from tutoring over the six months.

$200 + $150 + $180 + $190 + $230 + $325 = $1275

Divide by 6 to find the monthly average.

Since you want to create a conservative budget, it is wise to underestimate Marcel's variable income.

 

About $200/month is appropriate, as Marcel may not tutor very much in July and August.

Tutoring average income ~ $200/month

Add his regular income of $2210 from the hardware store. This is Marcel's estimated monthly income.

$2210 + $200 = $2410

 

Step 2: Average the budget categories and predict appropriate monthly amounts.

 

Rent

  • recurring expense
  • $600/month

Food

average

  • To prepare a conservative budget, overestimate his expenses for food.

  • Food prices may increase, so rounding $313.50 to $320 per month is likely a reasonable budget estimate.

Vehicle

average

  • To prepare a conservative budget, overestimate his vehicle expenses.

  • Fuel and repair costs are likely to increase, so rounding $382.50 to $390 per month is probably a reasonable budget estimate.

 

You will now finish creating Marcel’s budget by completing Try This 3.