At a shop in Japan, women's T-shirts are sold every 30 minutes for $18, and men's T-shirts are sold every 40 minutes for $15. This shop is open from 10 am until 10 pm. How much does the shop earn selling T-shirts per week?
First, the shop is open 12 hours * 60 minutes = <T>multiply(12, 60)=720 minutes per day.
So, 720 / 30 = <T>divide(720, 30)=24.0 women's T-shirts sold per day.
The shop earns 24 * $18 = $<T>multiply(24, 18)=432 selling women's T-shirts per day.
Similarly, 720 / 40 = <T>divide(720, 40)=18.0 men's T-shirts are sold per day.
The shop earns 18 * $15 = $<T>multiply(18, 15)=270 selling men's T-shirts per day.
The shop earns $432 + $270 = $<T>add(432, 270)=702 per day selling T-shirts.
The shop earns $702 * 7 = $<T>multiply(702, 7)=4914 per week.
