A person buys q1, q2, q3 and q4 units of four goods whose prices per unit are, re- spectively, $1, $2, $3 and $4. What is the total expenditure? What will be the total expenditure if the prices change to $4, $3, $2 and $1 per unit respectively?

Step-by-step explanation:

Quantity of good1 = q1

Unit price of good1 = $1

Quantity of good2 = q2

Unit price of good2 = $2

Quantity of good3 = q3

Unit price of good3 = $3

Quantity of good4 = q4

Unit price of good4 = $4

Total expenditure =

=

If the prices change to $4, $3, $2 and $1 per unit respectively, total expenditure =

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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the monthly balance will be $75,000