Related goods are nothing but substitutory goods such as tea and coffee, tomato and tamarind. If the price of tea has gone up then the consumer will have an option of substitution(i.e. coffee). Or if the price of coffee have come down while that of tea is constant the consumer would prefer the low cost drink i.e. coffee. So in this case due to fall in the price of related good/commodity i.e. coffee has an impact on other good i.e. tea though there is no change in the price of latter(tea).
Because the petrol price has gone up?
The price of Pizza has gone up
Over time all of them have increased in price.
Who set the price for coffee
Price has gone up
the price of ammo has gone up because guns are in demand. Now that we have a president that is belinving guns should be banned except for government purposes tehn it will be harder to find and get ammo and te price will keep going up.
Delonghi Coffee makers are high market coffee machines and so the price does reflect this. The cheapest can be around the å£60 mark going all the way up to å£300.
The price of gold has fluctuated in the last ten years, but overall it has gone up. This is because gold reserves in the ground have reduced as they are mined.
"The average price for brewed coffee is $1.38."
If the wages of coffee-bean pickers fell, coffee-bean companies would be able to hire more of them, because they could afford it. More workers can produce more coffee-beans, so supply increases. In this problem, it is implied that tea is a substitute good for coffee. If the price of tea fell, but the price of coffee stayed the same, people would switch to tea, to save a couple bucks. Demand for tea goes up, demand for coffee goes down.
I don't know what price you saw but check B&H photo in NY.