Section 2(74) “mixed supply” means two or more individual supplies of goods or services, or any combination thereof, made in conjunction with each other by a taxable person for a single price where such supply does not constitute a composite supply.
Illustration.— A supply of a package consisting of canned foods, sweets, chocolates, cakes, dry fruits, aerated drinks and fruit juices when supplied for a single price is a mixed supply. Each of these items can be supplied separately and is not dependent on any other. It shall not be a mixed supply if these items are supplied separately;
Section 8. The tax liability on a composite or a mixed supply shall be determined in the following manner, namely:— (a) a composite supply comprising two or more supplies, one of which is a principal supply, shall be treated as a supply of such principal supply; and (b) a mixed supply comprising two or more supplies shall be treated as a supply of that particular supply which attracts the highest rate of tax.
I would suggest to supply them separately to avoid high tax rate on Computer server.