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 = 
<gadget id="calculator">12*60</gadget>
<output>720</output>
720 minutes per day.
So, 720 / 30 = 
<gadget id="calculator">720/30</gadget>
<output>24</output>
24 women's T-shirts sold per day.
The shop earns 24 * $18 = $
<gadget id="calculator">24*18</gadget>
<output>432</output>
432 selling women's T-shirts per day.
Similarly, 720 / 40 = 
<gadget id="calculator">720/40</gadget>
<output>18</output>
18 men's T-shirts are sold per day.
The shop earns 18 * $15 = $
<gadget id="calculator">18*15</gadget>
<output>270</output>
270 selling men's T-shirts per day.
The shop earns $432 + $270 = $
<gadget id="calculator">432+270</gadget>
<output>702</output>
702 per day selling T-shirts.
The shop earns $702 * 7 = $
<gadget id="calculator">702*7</gadget>
<output>4_914</output>
4914 per week.

<result>4_914</result>