Pls help I don’t understand

Its simple.
Cost of t-Shirt each=$14
Cost of shorts each=$18
No. of clothes=x t-shirts and y shorts
so just multiply cost of each t-shirt no.of t-shirts and do the same thing with the Shorts
you get the answer as 14x +18y
There! you've expressed it in the form of ax+by and 14 and 18 are also positive or negative constant
Youve found the answer satisfing all the requirements
hope it helped you aand if it did please mark as brainliest answer
Thanks and keep studying