Sun Co$.$ was constructing fixed assets that qualified for interest capitalization. Sun had the following outstanding debt issuances during the entire year of construction:

$$6,000,000$ face value, $8\%$ interest.

$$8,000,000$ face value, $9\%$ interest.

None of the borrowings were specified for the construction of the qualified fixed asset. Average expenditures for the year were $$1,000,000.$ What interest rate should Sun use to calculate capitalized interest on the construction?

A$.8\mathrm{.}00\%$

B$.8\mathrm{.}50\%$

$8570\%$