Final answer:
The percent increase in the cost for a 30-second commercial from 1968 to 1973 is 63% (rounded to the nearest whole number).
Step-by-step explanation:
To calculate the percent increase in the cost for a 30-second commercial from 1968 to 1973, we need to find the difference between the two costs and divide it by the initial cost, then multiply by 100.
The difference in cost is $88,000 - $54,000 = $34,000.
The percent increase is ($34,000/$54,000) * 100 = 63.0%.
Therefore, the percent increase in the cost for a 30-second commercial from 1968 to 1973 is 63% (rounded to the nearest whole number).