VLOOKUP - Finding postage price vs Weight

I'd like to calculate automatically the postage price of a parcel according to a weight table but there is a problem with vlookup.

A B

1 100g £1.83
2 250g £2.16
3 500g £2.60
4 750g £2.99
4 1000g £3.45

Now if I use vlookup on this occasion for a 150g parcel, the price that will be returned is £1.83 as vlookup will return the nearest lower value to the 150g which is 100g. However, the postage for an 150g parcel is £2.16 instead as from 101g-250g the price is £2.16 according to the table.


Is there a way of doing this other than a series of "IF" functions.
If VLOOKUP could return the cell instead of the value of the cell perhaps I could add one cell down and find the value this way but I don't know how to do that.

Any suggestions please ?

Thanks
Yanni