1. Durian is not the main ingredient in Elvis Presley Durian Cakes, but it is accompanied by other ingredients, which are relatively low in cost.

2. The ingredients used in the Elvis Presley Durian Patties are not as expensive as the premium and rare durian varieties. On the contrary, the durians used in it are in large supply in the market, thus the cost and price are relatively low.

Combining these two reasons, the price of Elvis Presley Durian Cake is relatively low.