Choose one currency and one quantity
Convert amounts to the same currency before adding them. Record the rate or converted amount used, and make sure both candidates represent the quantity you need. A pair, a single item and a multipack are different purchases.
A displayed item price may exclude local delivery, international shipping or later charges. Read the current ordering page for what is included; this website does not quote service fees.
Worked example: a lower item price can cost more overall
For illustration, option A has an item total of 30, domestic delivery of 4, international shipping allowance of 18 and other costs of 3: total 55. Option B is 35 + 2 + 12 + 3: total 52. All amounts use the same hypothetical currency.
The example is arithmetic, not a shipping quote. Different packaging, destination, parcel dimensions or exchange rates can change the final amount.
Keep uncertain inputs visible
Write Estimated beside amounts that have not been quoted. If shipping is the main uncertainty, calculate a second scenario with a higher shipping allowance. Do not enter zero simply because a price is missing.
The worksheet below adds the four amounts you provide. It does not retrieve live rates, calculate customs liability or submit an order. Verify final charges with the relevant provider before payment.
Compare only items that meet your requirements
A low total does not compensate for the wrong dimensions or an unsuitable variation. Complete the measurement check before treating a candidate as ready to buy.
Keep your assumptions in the blank comparison sheet so you can revisit the calculation when a quote changes.
Give your shortlist
a realistic budget.
Use the same currency for every field. Enter your own estimates, including a deliberate zero when a cost does not apply.
This is arithmetic, not a shipping quote. Your total may change with parcel size, exchange rates and the final charges.