Ok need some help here…?
Determine the better buy by comparing the unit cost of each purchase: 128 megabytes of memory for $26.00
OR
512 megabytes of memory for $110.00?
Favorite Answer
They want unit cost, or cost per unit. In this case, the unit seems to be megabytes.
So, take each one and figure the cost per megabyte.
128/26 = ~4.92 per/mb
512/110 = ~4.65 per/mb
So, based on unit price, the best buy would be the 512.
Hope this helps!
Cost of each megabyte = 110 / 512 = 0.2148
Cost of 128 megabyte chip = 26.00
Unit cost of megabyte = 26 / 128 = 0.2031
The unit cost of the 26 dollar RAM (128 megabyte) is less than that of 512 megabytes. So, 4 pieces of 128 megabyte chips will cost less than 1 512 megabyte memory chip.
In practice, you may be better off buying the higher capacity chips even if they cost a little more, due to some other factors.
128 Mb at $26.00
= 128 Mb / $26.00
= 4.923 Mb per $
512 Mb at $110
= 512 Mb / $110.00
= 4.655 Mb per $
so you’re better off buying 128 Mb at $26.00
this is how it is done…
because 512 is 4×128 you need to multiply the price of the 128mb card by for to get the price of buying the four cards to equal 512mb. so that would be $26 x 4. which equals $104.
now you compare this new price to the single 512mb card price.
you will find that the 512mb card price at $110 is greater than the price of buying 4 128mb cards to get 512mb of memory which is only $104.
Therefore the 128mb memory is a better buy.
you can also work this out a different way by dividing the price of $110 by 4 to find that it equals &27.50. which is more expensive than $26 128mb memory.
Omarionz
512/110 so 1 mb is 4.6 something
so 512 mb isa better buy
