As a sort of pointer, a pound is 16 ounces. Firstly, we can divide 14 by 4 to give us how much the apples costs per pound, so this will give us 3.5, meaning that for every pound of apples it will costs 3.5$. Now we move on to the next portion, so to do this we can first start by dividing 84 by 14 which will give us 6. This means we can multiply 4 times 6 to give us how many pounds of apples will make it costs 84$ in total, this gives us 24 pounds. Next, we can be close to perfect by going with 3 apples in each pound will give us one pound of apples because 3 times 5 (the weight of an apple in ounces) will give us 15 ounces. Lastly, we can approximate the apples needed to make 84$ by multiplying 6 times 3 since 84 divided by 14 gives us 6 and 14$ is the price of 3 apples. 3 times 6 will give us 18 which means that 18 apples will cost 84$