Last year Wei Guan Inc. had $660 million of sales, and it had $230 million of fixed assets that were used at 65% of capacity. In millions, by how muc could Wei Guan's sales increase before it is required to increase its fixed assets? Do not round intermediate calculations. a. $355.38 million b. $661.54 million c. \$585.38 million d. $429.00 million e. \$348.50 million