For this solution, how was $1600\mathrm{.}43$ calculated: https:$//$www$.$chegg.com$/$homework$-$help$/$questions$-$and$-$answers$/$january$-1-2022-$pina$-$colada$-$lois$-$company$-$purchased$-12-$bonds$-$maturity$-$value$-306-000-329-1996-$q$122820638?$share$=7$d$97$ce$7$c$-4$b$3$c$-4$dad$-$a$742-6$aa$5$eab$705$fd