Ivanhoe Co. incurred research and development costs in 2021 as follows: Materials used in research and development projects $ 900000 Equipment acquired that will have alternate future uses in future research and development projects 2500000 Depreciation for 2021 on above equipment 416667 Personnel costs of persons involved in research and development projects 700000 Consulting fees paid to outsiders for research and development projects 250000 Indirect costs reasonably allocable to research and development projects 175000 $4941667 The amount of research and development costs charged to Ivanhoe's 2021 income statement should be

1850000.

$2016667.

$4350000.

$2441667.