 
 <prompt> James ya so ya bude quilt mai tsawo 16 na kudin da 20 na kudin. Ya yi amfani da patches da kuma kowane ya fi 4 square feet. Farkon 10 patches sun fi $10 kowane kuma kowane patch bayan haka ya fi yawa da nawa. Me ya fi kudin patches na quilt? <response>: The patch is 16*20=320 square feet
So he needs 320/4=80 patches
The first 10 patches cost 10*10=$100
He gets a discount on the next 80-10=70 patches
They each cost 10/2=$5
So in total they cost 70*5=$350
That means in total he paid 100+350=$450

The answer will be 450. 