The printf method, like the print method, does not start a new line after the output. If you want output to continue on a separate line, add the $\%$n format specifier. For example, the statement

System.out.printf$("$Quantity: $\%7$d$\%$nTotal: $\%10\mathrm{.}2$f$\%$n$",$ quantity, total$)$;

yields a printout

Quantity: $24$

Total: $17\mathrm{.}29$