Please assist by keeping your response basic. I have no coding skills.

I Offer Copiers on my woocommerce website. my intention is to allow product add-ons which i have done using advanced product options. I have two options in terms of pricing. Outright Purchase and Rental. with the building of the product this will ultimately change the total outright price.I would then like to offer the total cost of outright purchase multiplied by 0.02580 which will give a rental figure of R1032.00

I am not looking to pay for plugins.

Thanks in advance