A program consists of the following instruction mix: $20\%$ load instructions, $20\%$ store instructions, $10\%$ branch instructions, and $50\%$ ALU instructions. On a multi$-$cycle CPU, each load instruction takes $5$ cycles, the store and ALU instructions both require $4$ cycles, and all remaining instructions require $3$ cycles. The total number of instructions the program executes is $200$ billion. The slowest stage $($state$)$ in the CPU requires $400$ picoseconds, and the fastest stage requires $150$ picoseconds. What is the execution time $($in seconds$)$ of the program running on this CPU?