Brain bought 2 shirts for 14.50 each and a pair of shoes for 29.99 the sales tax was 6%

Cost of each shirt bought by Brain = 14.50

Then

Cost of 2 shirts bought by Brain = 2 * 14.50

= 29

Cost of a pair of shoes = 29.99

Total amount spent by Brain before tax = 29 + 29.99

= 58.99

Percentage of sales tax that needs to be paid = 6%

Amount of sales tax that needs to be [paid = (6/100) * 58.99

= 353.94/100

= 3.54

So

the total amount spent by Brain including tax = 58.99 + 3.54

= 62.53

I hope this is the answer you were looking for.