In: Accounting
In a month, I can sell 420 of my unlicensed Warriors T-shirts at a price of $12. At $18, I sell 180. The T-shirts cost me $8 each, and I bribe the local law enforcement $300 per month to use a corner near a BART station to sell my shirts.
1. Assume price-demand is linear
a. Find the slope of the price-demand function.
b. Find the vertical-intercept of the price-demand function.
c. Write a function to predict demand (in a month) given any price.
d. Predict the demand at a price of $10.
e. What price fetches a demand of 800 shirts?
2. Assume cost is linear.
a. Write a function to predict cost (in a month) given any price.
b. Predict the cost at a price of $10.
| Price-demand is linear | |
| slope of the price-demand function ((420-180)/(12-18)) | (40) | 
| Vertical-intercept of the price-demand function ((12*-(-40)+420) or ((18*-(-40)+180) | 900 | 
| Function to predict demand (in a month) given any price (Where P means Price and Q means Quantity sold) | Q = 900 - 40P | 
| Predict the demand at a price of $10 (900-(40*10)) | 500 | 
| What price fetches a demand of 800 shirts | |
| Q = 900 - 40P | |
| 800 = 900 - 40P | |
| 800 + 40P = 900 | |
| 40P = 900 - 800 | |
| 40P = 100 | |
| P = 100 / 40 | |
| P = 100 / 40 = $2.50 | |
| What price fetches a demand of 800 shirts | $ 2.50 | 
| cost is linear | |
| Fixed cost per Month | $ 300 | 
| Variable cost per T-shirt | $ 8 | 
| Function to predict cost (in a month) given any price (where Y means cost and X means Quantity Sold) | Y = 300 + 8X | 
| Predict the cost at a price of $10 | |
| When the price is $ 10 then 500 T-shirts sold. | |
| Predict the cost at a price of $10 (300+8*(500)) | $ 4,300 |