Help on calculating a formula for shipping costs

On my spreadsheet I need my customers to be able to punch in any weight in the ranges below and be given the price. Up until 70.5 kg I have calculated each weight and priced each service offerred. But from 71kg onwards I need to multiply each price accorrding to the weight ranges. Can anyone, who is much clever than I help me here (I need the formula) as my excel knowledge does not reach this far and Im starting to short circuit.
IPHW 71 £13.30 £10.40 £4.05 £3.80 £3.35
IPHW 100 £13.10 £10.25 £4.10 £3.80 £3.35
IPHW 300 £12.05 £9.45 £3.80 £3.50 £3.30
IPHW 500 £11.25 £8.75 £3.50 £3.25 £3.25
IPHW 1000 £10.60 £8.30 £3.35 £3.10 £3.25


Column One: Means type of parcel
Coumn 2: Weight
Column 3 - 7: prices per service


Regards

BOTS123

Can you give an example? If the weight of the package is 112 kg...or 330 kg what should the price be, how is it calculated from your table?

112kg Col 3: 1467.2 Column 4: 1148 column 5: 459.20 column 6: 425.60 column 7: 375.20

330kg Col 3: 3976.50 Column 4: 3118.50 column 5: 1254 column 6: 1155 column 7: 1089


ALL FINE - Slight panic. Figures are correct